WebSocket benchmark · Linode (Akamai Cloud) · Shared CPU · 14 October 2026
8 vCPU, 32 GB RAM : 3,662,564 WebSocket clients connected at once.
API Maker 4.0.0 on a Linode 32 GB (g6-standard-8) : 8 shared vCPUs and 32 GB of RAM at $192 a month, its MongoDB and Redis on the same machine. A second server opened WebSocket clients, each with both tokens and a subscription of its own, until the memory of the server was full, while autocannon made the calls which notify them : every run 60 seconds, the memory and CPU of every part sampled each second.
Clients connected
3,662,564
the memory was full : 4,478 MB left
Memory per client
8.8KB
API Maker 3.2 · kernel 4.5 · Redis 1.1
New clients / second
10,939
both tokens and a subscription · 24,719 without one
Notification delivered in
0.94ms
p50 at 1,000 a second · p99 6.54 ms
The server¶
| Server | Linode (Akamai Cloud), Linode 32 GB (g6-standard-8), shared cpu, $192 / month |
| CPU | AMD EPYC 7642 48-Core Processor, 8 shared vCPUs (KVM) KVM guest, 1 thread per core · L1d 512 KiB (8 instances) · L2 4 MiB (8 instances) · L3 128 MiB (8 instances) · BogoMIPS 4599.99 |
| Memory | 32 GB (32,095 MB usable), swap 8.5 GB (496 MB of Linode + 8 GB made by the installer) |
| Disk, region | 640 GB SSD, Mumbai, India (ap-west) |
| System | Ubuntu 24.04.4 LTS, Linux 6.8.0-134, Docker 29.9.0 |
| API Maker | 4.0.0 : release build of api_maker_be_rust 423a34c with the new WebSocket core of 14 October 2026 (opt-level 3, fat LTO), installed by its installer (https://apimaker.dev/v4/install.sh), no reverse proxy |
| Settings | the defaults of the installer : one worker thread per vCPU, up to 8,216,320 open files for the service (LimitNOFILE), and the sandboxes kept running for the whole run (removeSandboxInactiveSinceMinutes 1440) |
| Network limits | as the installer sets them : 8,216,320 connections tracked by the firewall of Linux (net.netfilter.nf_conntrack_max), 16,384 waiting to be accepted (net.core.somaxconn). The memory of all its TCP connections together : raised by API Maker as the clients came, to 7.8 GB at the most (net.ipv4.tcp_mem, 25 % of the memory ; Linux gives 9 %) |
| Databases | MongoDB 8.0.10 (the MongoDB of API Maker, a replica set of one member, in Docker) · Redis 7.0.5 (the Redis of API Maker, in Docker) : on the same server. No other database runs |
| Sandboxes | TypeScript on Node.js 24.21.0 (an image of 404 MB built by API Maker), 2 sandboxes of the account (sandboxCountForAdmin 2, the default) |
| Load generator | Dedicated 64 GB (g6-dedicated-32) : AMD EPYC 7642 48-Core Processor, 32 dedicated vCPUs, Ubuntu 24.04.4 LTS. The WebSocket clients : am_ws_load, a program in Rust made for these benchmarks, a socket and a task per client, from 151 addresses of the load generator. The HTTP calls : Node.js 24.21.0, autocannon 8.0.0 |
| Network | A VLAN of the same data centre, round trip 1.89 ms (ping) |
| Date | 14 October 2026, 03:18 to 04:26 UTC |
Only what the run needs was running : API Maker and its two sandboxes, its MongoDB and its Redis. API Maker was restarted and the swap emptied before the run. How every number was taken : How the WebSocket benchmarks are made. Every server side by side : All results. The APIs of this server : 8 vCPU · 32 GB, API benchmark.
The data¶
- The clients connect to
ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>: the token of an API user, and the token of a person, a row of thecustomerstable of the benchmark dataset (https://apimaker.dev/json/benchmark_dataset.json) made by a DB token generator. API Maker checks both. - A subscription is one
REGISTERfor the custom WebSocket eventorder-updateswith a condition of its own :{ conditionType: 'RESPONSE', criteria: { recipientId: '<the number of the client>' } }. It is the way one notification reaches one person. - A notification for one person is 141 bytes ; a row of the dataset told to the clients of a table is 321 bytes.
- The tables are the ones of the API benchmarks, in MongoDB : ten rows of customers, ten columns each.
Results at a glance¶
Subscribe to an event with a can user connect codethe code ran in the server
Subscribe : the code reads the databasethe code ran in the sandbox
Subscribe : the code reads the clockthe code ran in the sandbox
100 clients at a time connect, are let in and leave, for 60 seconds.
A notification for one person21,628 calls / second
A broadcast199 calls / second
Rows inserted in a table1,396 calls / second
As many calls as the server takes : what the clients received each second.
How many clients fit¶
Clients connect 8,000 a second, level after level, each with both tokens and a subscription of its own ; at each level they wait 30 seconds while the server is sampled (the level the run stops at, 60). The run stopped adding clients at 3,662,564 : the memory of the server was full. 4,129 MB of its 32,096 MB were still counted as available, and Linux had moved 2,537 MB to the swap since the clients began to connect, to make that room : 1,592 MB were left (the run stops when what is available, less what Linux moved to the swap since the clients began to connect, is under 5 % of the memory of the server).
API MakerMongoDB of API MakerRedisSandboxesLinux : its sockets, Docker, the restAvailable
No client
10,000 clients
250,000 clients
500,000 clients
1,000,000 clients
1,500,000 clients
2,000,000 clients
2,500,000 clients
3,000,000 clients
3,500,000 clients
3,662,564 clients
| Clients | API Maker | Redis | Kernel | MongoDB | Sandboxes | Server, used | Available | Swap | CPU busy |
|---|---|---|---|---|---|---|---|---|---|
| None (at rest) | 121 | 1 | 242 | 124 | 57 | 1,083 | 31,013 | 0 | 0.6 % |
| 10,000 | 163 | 12 | 379 | 162 | 904 | 2,123 | 29,973 | 0 | 1.0 % |
| 250,000 | 938 | 250 | 1,369 | 244 | 906 | 4,009 | 28,087 | 0 | 2.5 % |
| 500,000 | 1,728 | 498 | 2,485 | 243 | 906 | 6,001 | 26,095 | 0 | 6.1 % |
| 1,000,000 | 3,395 | 996 | 4,709 | 243 | 906 | 10,116 | 21,980 | 0 | 11.3 % |
| 1,500,000 | 4,923 | 1,525 | 6,942 | 243 | 906 | 14,082 | 18,014 | 0 | 20.7 % |
| 2,000,000 | 6,600 | 1,990 | 9,174 | 243 | 906 | 18,249 | 13,847 | 0 | 25.6 % |
| 2,500,000 | 8,129 | 2,591 | 11,398 | 243 | 906 | 22,097 | 9,999 | 0 | 26.3 % |
| 3,000,000 | 9,657 | 3,048 | 13,564 | 243 | 905 | 25,904 | 6,191 | 0 | 36.2 % |
| 3,500,000 | 10,594 | 3,505 | 15,732 | 108 | 356 | 27,815 | 4,281 | 1,431 | 46.1 % |
| 3,662,564 | 10,196 | 3,658 | 16,443 | 61 | 245 | 27,618 | 4,478 | 2,691 | 50.6 % |
Memory in MB. API Maker is the resident memory of its process ; Redis is the memory of its data (used_memory) ; the kernel of Linux keeps every socket and every tracked connection in its slab ; a container is counted the way docker stats counts it. CPU busy is the whole server while the clients wait : the server pings every client once a minute, and each answers.
Memory when the server is full¶
With 3,662,564 clients connected and waiting, of the 32,096 MB of the server :
| Part | At rest, no client | 3,662,564 clients | More |
|---|---|---|---|
| API Maker (process) | 121 MB | 10,196 MB | + 10,075 MB |
| Redis (container) | 3 MB | 3,533 MB | + 3,530 MB |
| Linux kernel : sockets, tracked connections (slab) | 242 MB | 16,443 MB | + 16,201 MB |
| MongoDB of API Maker (container) | 124 MB | 61 MB | − 63 MB |
| Sandboxes (2 containers) | 57 MB | 245 MB | + 188 MB |
| Whole server, used | 1,083 MB | 27,618 MB | + 26,535 MB |
| Available | 31,013 MB | 4,478 MB | |
| Swap used | 0 MB | 2,691 MB | |
| Open files of API Maker | 28 | 3,662,604 | |
| Keys of Redis · channels it listens on | 13 · 5 | 7,325,144 · 3,662,569 |
MongoDB and the sandboxes grew during the runs before this one (the inserts, the code of the events), not with the clients.
What a client costs¶
Between 1,000,000 and 3,000,000 clients (5 levels), each client more cost the server 8.8 KB :
| Where | Per client | What it is |
|---|---|---|
| API Maker | 3.2 KB | The client itself : its socket and the one task which reads it, its tokens and what they said, its subscription and the channel it is told on. |
| Linux kernel | 4.5 KB | The TCP socket, and the entry of the connection in the table of the firewall (Docker makes Linux track every connection). |
| Redis | 1.1 KB | The subscription : its key, its place in the list of its condition, and the channel API Maker listens on. |
| In all | 8.8 KB | 118,483 clients per GB of memory. |
Measured over the levels at which nothing was in the swap. The memory the whole server had available went down by 8.1 KB per client : MongoDB, the sandboxes and the cache of files give some back while the clients take theirs.
One more subscription, and a broadcast to everybody¶
With 500,000 clients connected, every client sent a second REGISTER, for an event without a condition (announcements), 8,000 of them a second : 500,000 were taken in 62.5 s. They waited 30 seconds with two subscriptions each, were told 3 broadcasts, one call of the emit event WS API each, and took the subscription back with UNREGISTER.
One subscription more
1.2KB
per client : API Maker 0.5 KB · Redis 0.7 KB
A broadcast to 500k clients
5.63s
until the last client read it
Half of them told after
4,256ms
the first after 2,574 ms
Clients told / second
88,778
one call, every client
| Broadcast | Clients told | The call answered after | The first client | Half of them | 99 % of them | The last one | Clients told a second |
|---|---|---|---|---|---|---|---|
| 1 | 500,000 of 500,000 | 6.69 s | 3,361 ms | 4,932 ms | 6,652 ms | 6,685 ms | 74,798 |
| 2 | 500,000 of 500,000 | 5.63 s | 2,574 ms | 4,256 ms | 5,603 ms | 5,632 ms | 88,778 |
| 3 | 500,000 of 500,000 | 6.06 s | 2,284 ms | 3,686 ms | 6,013 ms | 6,058 ms | 82,536 |
One call of the emit event WS API tells every client : API Maker asks Redis for the clients of the event, publishes the notification for each of them, and the server which holds a client sends it. The times are counted from the moment the call is written to the moment a client reads its notification.
| Memory, 500,000 clients | One subscription each | Two subscriptions each | A subscription more, per client |
|---|---|---|---|
| API Maker | 1,728 MB | 1,974 MB | 0.5 KB |
| Redis (its data) | 498 MB | 851 MB | 0.7 KB |
| Keys of Redis · channels | 1,000,016 · 500,005 | 1,500,017 · 1,000,005 | |
| Whole server, less available | 1.2 KB |
New clients per second¶
How many clients a second the server lets in : 100 clients at a time connect, are let in and leave, one after the other, for 60 seconds (after 5 seconds which are not counted). It is what a server faces when its clients all come back, after a deployment or a network cut. The times are counted from the start of the TCP connection.
Connect : the token of the API user¶
A client connects with x-am-authorization alone, is told CONNECTED, and leaves. API Maker checks the token of the API user and finds its groups : what every WebSocket client costs before it asks for anything.
Clients / second
24,511
1,472,138 clients in 60 s, 100 at a time
Let in after, p50
2.50ms
connected 2.50 ms · TCP 0.24 ms
Let in after, p99
6.24ms
max 38.6 ms
Refused or lost
0
not connected, not subscribed, no answer
Server during this run API Maker 6.7 vCPU · MongoDB 0.0 vCPU · whole server busy 89 % · load generator busy 17 %
$ am_ws_load churn -c 100 -d 60 "ws://<server>:38246/?x-am-authorization=<token>"
Running 60s test @ ws://<server>:38246
100 clients at a time : connect, CONNECTED, leave
┌─────────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ TCP connect │ 0.18 ms │ 0.24 ms │ 0.52 ms │ 0.98 ms │ 0.28 ms │ 0.3 ms │ 33.86 ms │
├─────────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ CONNECTED │ 1.12 ms │ 2.5 ms │ 4.54 ms │ 6.24 ms │ 2.61 ms │ 1.16 ms │ 38.59 ms │
├─────────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ Left │ 2.33 ms │ 3.86 ms │ 6.54 ms │ 9.34 ms │ 4.05 ms │ 1.55 ms │ 47.04 ms │
└─────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┴──────────┘
┌─────────────┬───────┬────────┬────────┬────────┬──────────┬─────────┬───────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├─────────────┼───────┼────────┼────────┼────────┼──────────┼─────────┼───────┤
│ Clients/Sec │ 8,641 │ 12,298 │ 25,398 │ 26,978 │ 24,535.6 │ 3295.13 │ 8,641 │
└─────────────┴───────┴────────┴────────┴────────┴──────────┴─────────┴───────┘
Time from the start of the connection to each step. Clients counted once per second.
# of samples: 60
1.47M clients let in in 60.06s, 0 refused or lost
Connect : both tokens¶
A client connects with x-am-authorization and x-am-user-authorization, is told CONNECTED, and leaves. Both tokens are checked : the one of the API user, and the one of a person, made by the DB token generator of the account.
Clients / second
24,719
1,484,603 clients in 60 s, 100 at a time
Let in after, p50
2.53ms
connected 2.53 ms · TCP 0.24 ms
Let in after, p99
4.72ms
max 21.3 ms
Refused or lost
0
not connected, not subscribed, no answer
Server during this run API Maker 7.0 vCPU · MongoDB 0.0 vCPU · whole server busy 92 % · load generator busy 20 %
$ am_ws_load churn -c 100 -d 60 "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
Running 60s test @ ws://<server>:38246
100 clients at a time : connect, CONNECTED, leave
┌─────────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ TCP connect │ 0.18 ms │ 0.24 ms │ 0.47 ms │ 0.58 ms │ 0.27 ms │ 0.17 ms │ 17.74 ms │
├─────────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ CONNECTED │ 1.12 ms │ 2.53 ms │ 4.23 ms │ 4.72 ms │ 2.57 ms │ 0.79 ms │ 21.26 ms │
├─────────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ Left │ 2.35 ms │ 3.94 ms │ 6.13 ms │ 6.69 ms │ 4.02 ms │ 1 ms │ 22.66 ms │
└─────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┴──────────┘
┌─────────────┬────────┬────────┬────────┬────────┬──────────┬────────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├─────────────┼────────┼────────┼────────┼────────┼──────────┼────────┼────────┤
│ Clients/Sec │ 22,369 │ 22,413 │ 24,828 │ 26,107 │ 24,743.4 │ 803.23 │ 22,369 │
└─────────────┴────────┴────────┴────────┴────────┴──────────┴────────┴────────┘
Time from the start of the connection to each step. Clients counted once per second.
# of samples: 60
1.48M clients let in in 60.06s, 0 refused or lost
Connect with both tokens and subscribe¶
The whole of what an application does : connect with both tokens, CONNECTED, one REGISTER for a custom WebSocket event with a condition of its own (recipientId : its user id), the answer, then leave. API Maker checks the groups and the auth provider of the event, keeps the subscription in Redis and listens on its channel ; when the client leaves, all of it is taken back.
Clients / second
10,939
656,986 clients in 60 s, 100 at a time
Let in after, p50
7.91ms
connected 2.10 ms · TCP 0.23 ms
Let in after, p99
13.4ms
max 54.7 ms
Refused or lost
0
not connected, not subscribed, no answer
Server during this run API Maker 5.2 vCPU · Redis 0.5 vCPU · whole server busy 80 % · load generator busy 9 %
$ am_ws_load churn -c 100 -d 60 "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>" --register 'order-updates'
Running 60s test @ ws://<server>:38246
100 clients at a time : connect, CONNECTED, REGISTER, leave
┌─────────────┬─────────┬─────────┬──────────┬──────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────────┼─────────┼─────────┼──────────┼──────────┼─────────┼─────────┼──────────┤
│ TCP connect │ 0.18 ms │ 0.23 ms │ 0.47 ms │ 0.66 ms │ 0.26 ms │ 0.23 ms │ 16.18 ms │
├─────────────┼─────────┼─────────┼──────────┼──────────┼─────────┼─────────┼──────────┤
│ CONNECTED │ 0.72 ms │ 2.1 ms │ 4.35 ms │ 5.12 ms │ 2.21 ms │ 1.03 ms │ 22.69 ms │
├─────────────┼─────────┼─────────┼──────────┼──────────┼─────────┼─────────┼──────────┤
│ REGISTER │ 5.05 ms │ 7.91 ms │ 11.64 ms │ 13.37 ms │ 8.08 ms │ 2.11 ms │ 54.66 ms │
├─────────────┼─────────┼─────────┼──────────┼──────────┼─────────┼─────────┼──────────┤
│ Left │ 5.96 ms │ 8.9 ms │ 13.07 ms │ 14.94 ms │ 9.12 ms │ 2.3 ms │ 56.42 ms │
└─────────────┴─────────┴─────────┴──────────┴──────────┴─────────┴─────────┴──────────┘
┌─────────────┬───────┬───────┬────────┬────────┬──────────┬─────────┬───────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├─────────────┼───────┼───────┼────────┼────────┼──────────┼─────────┼───────┤
│ Clients/Sec │ 4,045 │ 9,217 │ 11,172 │ 11,916 │ 10,949.8 │ 1037.85 │ 4,045 │
└─────────────┴───────┴───────┴────────┴────────┴──────────┴─────────┴───────┘
Time from the start of the connection to each step. Clients counted once per second.
# of samples: 60
657k clients let in in 60.06s, 0 refused or lost
Subscribe to an event with a can user connect code¶
The same, on an event whose can user connect code decides who may subscribe : it reads the person of x-am-user-authorization from g.req.auth. The code ran in the server itself (lean code, QuickJS).
Clients / second
9,280
557,330 clients in 60 s, 100 at a time
Let in after, p50
9.35ms
connected 2.35 ms · TCP 0.23 ms
Let in after, p99
16.9ms
max 60.5 ms
Refused or lost
0
not connected, not subscribed, no answer
Server during this run API Maker 5.5 vCPU · Redis 0.4 vCPU · whole server busy 83 % · load generator busy 8 %
$ am_ws_load churn -c 100 -d 60 "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>" --register 'checked-token'
Running 60s test @ ws://<server>:38246
100 clients at a time : connect, CONNECTED, REGISTER, leave
┌─────────────┬─────────┬──────────┬──────────┬─────────┬──────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────────┼─────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ TCP connect │ 0.18 ms │ 0.23 ms │ 0.46 ms │ 0.65 ms │ 0.26 ms │ 0.22 ms │ 13.61 ms │
├─────────────┼─────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ CONNECTED │ 0.78 ms │ 2.35 ms │ 5 ms │ 5.88 ms │ 2.49 ms │ 1.19 ms │ 28.66 ms │
├─────────────┼─────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ REGISTER │ 5.72 ms │ 9.35 ms │ 14.15 ms │ 16.9 ms │ 9.56 ms │ 2.59 ms │ 60.54 ms │
├─────────────┼─────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ Left │ 6.8 ms │ 10.46 ms │ 15.81 ms │ 18.8 ms │ 10.75 ms │ 2.82 ms │ 62.27 ms │
└─────────────┴─────────┴──────────┴──────────┴─────────┴──────────┴─────────┴──────────┘
┌─────────────┬───────┬───────┬───────┬────────┬─────────┬────────┬───────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├─────────────┼───────┼───────┼───────┼────────┼─────────┼────────┼───────┤
│ Clients/Sec │ 4,722 │ 5,146 │ 9,294 │ 10,398 │ 9,288.8 │ 999.31 │ 4,722 │
└─────────────┴───────┴───────┴───────┴────────┴─────────┴────────┴───────┘
Time from the start of the connection to each step. Clients counted once per second.
# of samples: 60
557k clients let in in 60.06s, 0 refused or lost
Subscribe : the code reads the database¶
The same, with a can user connect code which also reads the person from the database (g.sys.db.getAll with a find) before it answers : one read of MongoDB for every subscription. The code ran in a sandbox of the account.
Clients / second
4,381
263,133 clients in 60 s, 100 at a time
Let in after, p50
21.0ms
connected 2.84 ms · TCP 0.23 ms
Let in after, p99
35.9ms
max 74.3 ms
Refused or lost
0
not connected, not subscribed, no answer
Server during this run API Maker 2.6 vCPU · Redis 0.2 vCPU · MongoDB 1.3 vCPU · sandboxes 2.8 vCPU · whole server busy 92 % · load generator busy 4 %
$ am_ws_load churn -c 100 -d 60 "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>" --register 'checked-database'
Running 60s test @ ws://<server>:38246
100 clients at a time : connect, CONNECTED, REGISTER, leave
┌─────────────┬──────────┬──────────┬──────────┬─────────┬──────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────────┼──────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ TCP connect │ 0.18 ms │ 0.23 ms │ 0.43 ms │ 0.49 ms │ 0.25 ms │ 0.12 ms │ 15.08 ms │
├─────────────┼──────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ CONNECTED │ 1 ms │ 2.84 ms │ 7.01 ms │ 8.19 ms │ 3.14 ms │ 1.57 ms │ 18.59 ms │
├─────────────┼──────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ REGISTER │ 12.35 ms │ 21.01 ms │ 32.99 ms │ 35.9 ms │ 21.43 ms │ 5.28 ms │ 74.3 ms │
├─────────────┼──────────┼──────────┼──────────┼─────────┼──────────┼─────────┼──────────┤
│ Left │ 13.51 ms │ 22.37 ms │ 34.56 ms │ 37.5 ms │ 22.81 ms │ 5.39 ms │ 76.1 ms │
└─────────────┴──────────┴──────────┴──────────┴─────────┴──────────┴─────────┴──────────┘
┌─────────────┬───────┬───────┬───────┬───────┬─────────┬────────┬───────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├─────────────┼───────┼───────┼───────┼───────┼─────────┼────────┼───────┤
│ Clients/Sec │ 3,972 │ 4,021 │ 4,362 │ 4,869 │ 4,385.6 │ 257.47 │ 3,972 │
└─────────────┴───────┴───────┴───────┴───────┴─────────┴────────┴───────┘
Time from the start of the connection to each step. Clients counted once per second.
# of samples: 60
263k clients let in in 60.06s, 0 refused or lost
Subscribe : the code reads the clock¶
The same, with a can user connect code which reads the time of the machine (Date.now()) : code which is not lean, so API Maker runs it in a sandbox of the account. The code ran in a sandbox of the account.
Clients / second
7,741
464,920 clients in 60 s, 100 at a time
Let in after, p50
11.3ms
connected 2.10 ms · TCP 0.23 ms
Let in after, p99
25.6ms
max 66.5 ms
Refused or lost
0
not connected, not subscribed, no answer
Server during this run API Maker 4.6 vCPU · Redis 0.4 vCPU · MongoDB 0.0 vCPU · sandboxes 1.3 vCPU · whole server busy 88 % · load generator busy 6 %
$ am_ws_load churn -c 100 -d 60 "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>" --register 'checked-sandbox'
Running 60s test @ ws://<server>:38246
100 clients at a time : connect, CONNECTED, REGISTER, leave
┌─────────────┬─────────┬──────────┬──────────┬─────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────────┼─────────┼──────────┼──────────┼─────────┼─────────┼─────────┼──────────┤
│ TCP connect │ 0.18 ms │ 0.23 ms │ 0.49 ms │ 1.09 ms │ 0.27 ms │ 0.34 ms │ 17.23 ms │
├─────────────┼─────────┼──────────┼──────────┼─────────┼─────────┼─────────┼──────────┤
│ CONNECTED │ 0.85 ms │ 2.1 ms │ 4.9 ms │ 6.51 ms │ 2.31 ms │ 1.22 ms │ 32.18 ms │
├─────────────┼─────────┼──────────┼──────────┼─────────┼─────────┼─────────┼──────────┤
│ REGISTER │ 6.95 ms │ 11.26 ms │ 19.63 ms │ 25.6 ms │ 11.8 ms │ 3.63 ms │ 66.5 ms │
├─────────────┼─────────┼──────────┼──────────┼─────────┼─────────┼─────────┼──────────┤
│ Left │ 7.94 ms │ 12.3 ms │ 21.07 ms │ 28.1 ms │ 12.9 ms │ 3.85 ms │ 70.27 ms │
└─────────────┴─────────┴──────────┴──────────┴─────────┴─────────┴─────────┴──────────┘
┌─────────────┬───────┬───────┬───────┬───────┬─────────┬────────┬───────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├─────────────┼───────┼───────┼───────┼───────┼─────────┼────────┼───────┤
│ Clients/Sec │ 3,478 │ 4,539 │ 7,910 │ 8,520 │ 7,748.7 │ 897.72 │ 3,478 │
└─────────────┴───────┴───────┴───────┴───────┴─────────┴────────┴───────┘
Time from the start of the connection to each step. Clients counted once per second.
# of samples: 60
465k clients let in in 60.06s, 0 refused or lost
Can user connect code¶
An event of the WebSocket Events page can carry a can user connect code : API Maker runs it for every subscription to the event, with the tokens of the client in g.req.auth and the subscription in g.req.eventData, and lets the client subscribe when it returns { canConnect: true }. Three codes were measured : one which reads the person of the token, one which also reads the database, one which reads the clock.
Can user connect code of the event checked-token : ran in the server
import * as T from 'types';
async function main(g: T.IAMGlobal) {
// The person of x-am-user-authorization : only somebody who signed in subscribes, from a country we serve.
const person = g.req.auth.authAMDB;
if (!person) return { canConnect: false, errorText: 'Sign in first.' };
return { canConnect: person.country === 'India', errorText: 'Not available in your country.' };
};
module.exports = main;
Can user connect code of the event checked-database : ran in the sandbox
import * as T from 'types';
async function main(g: T.IAMGlobal) {
const person = g.req.auth.authAMDB;
if (!person) return { canConnect: false, errorText: 'Sign in first.' };
// Still a customer ? One read of the database for every subscription.
const rows = await g.sys.db.getAll({ instance: 'mongodb', database: 'am_bench', collection: 'customers', queryParams: { find: { customer_id: person.customer_id } } });
return { canConnect: rows.length === 1 && rows[0].country === 'India', errorText: 'Not a customer any more.' };
};
module.exports = main;
Can user connect code of the event checked-sandbox : ran in the sandbox
import * as T from 'types';
async function main(g: T.IAMGlobal) {
const person = g.req.auth.authAMDB;
if (!person) return { canConnect: false, errorText: 'Sign in first.' };
// The time of the machine : this code runs in the sandbox of the account.
const hour = new Date(Date.now()).getUTCHours();
return { canConnect: person.country === 'India' && hour >= 0, errorText: 'Not available in your country.' };
};
module.exports = main;
| Can user connect code | Runs in | Clients / second | Subscribed after, p50 | p99 | Against no code |
|---|---|---|---|---|---|
| No code | – | 10,939 | 7.91 ms | 13.4 ms | – |
| Reads the person of the token | the server (QuickJS) | 9,280 | 9.35 ms | 16.9 ms | 15 % fewer |
| Reads the person from the database | a sandbox of the account | 4,381 | 21.0 ms | 35.9 ms | 60 % fewer |
| Reads the clock | a sandbox of the account | 7,741 | 11.3 ms | 25.6 ms | 29 % fewer |
Lean code (it only reads what it is handed) runs in the server itself, with QuickJS, on the thread which serves the client. Code which needs more runs in a sandbox of the account : every subscription is then a round trip to the sandbox.
Notifications¶
With 10,000 clients connected, autocannon makes the HTTP calls which notify them, for 60 seconds, and the clients count what they receive and how late. Each kind of notification is measured twice : at a pace far under what the server takes, which shows how long a notification takes, and with no pace, which shows how many a second the server tells. Delivery is the time from the moment autocannon writes the request to the moment the client reads the notification : the HTTP call, API Maker, Redis, and the WebSocket.
A notification for one person¶
autocannon calls the emit event WS API with both tokens ; every call names another one of the 10,000 connected clients (recipientId), which is the only one told. The clients measure how long each notification took from the moment its request was written.
Calls / second (paced)
1,000
60,000 calls in 60 s, 10 connections
Notifications / second
983
60,010 received by 10,000 clients
Delivery p50
0.94ms
average 1.14 ms
Delivery p99
6.54ms
max 21.3 ms
Not delivered
0
0 calls failed
Server during this run API Maker 0.4 vCPU · Redis 0.1 vCPU · whole server busy 7 % · load generator busy 1 %
$ autocannon -c 10 -d 60 -R 1000 -l -m POST -b '{"name":"order-updates","eventData":{"recipientId":"<id of a client>","t":<now>,"type":"order-updated","order_no":1001,"status":"SHIPPED"}}' -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" -H "content-type: application/json" "http://<server>:38246/api/system-api/bench/emit-event-ws"
Running 60s test @ http://<server>:38246/api/system-api/bench/emit-event-ws
10 connections
┌─────────┬──────┬──────┬───────┬───────┬─────────┬─────────┬───────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼──────┼───────┼───────┼─────────┼─────────┼───────┤
│ Latency │ 0 ms │ 1 ms │ 7 ms │ 10 ms │ 1.25 ms │ 1.92 ms │ 23 ms │
└─────────┴──────┴──────┴───────┴───────┴─────────┴─────────┴───────┘
┌───────────┬────────┬────────┬────────┬────────┬────────┬───────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────────┼────────┼────────┼────────┼────────┼───────┼────────┤
│ Req/Sec │ 995 │ 998 │ 1,000 │ 1,003 │ 1,000 │ 1.26 │ 995 │
├───────────┼────────┼────────┼────────┼────────┼────────┼───────┼────────┤
│ Bytes/Sec │ 355 kB │ 356 kB │ 357 kB │ 358 kB │ 357 kB │ 436 B │ 355 kB │
└───────────┴────────┴────────┴────────┴────────┴────────┴───────┴────────┘
Req/Bytes counts sampled once per second.
# of samples: 60
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 0 │
├────────────┼──────────────┤
│ 0.01 │ 0 │
├────────────┼──────────────┤
│ 0.1 │ 0 │
├────────────┼──────────────┤
│ 1 │ 0 │
├────────────┼──────────────┤
│ 2.5 │ 0 │
├────────────┼──────────────┤
│ 10 │ 0 │
├────────────┼──────────────┤
│ 25 │ 0 │
├────────────┼──────────────┤
│ 50 │ 1 │
├────────────┼──────────────┤
│ 75 │ 1 │
├────────────┼──────────────┤
│ 90 │ 3 │
├────────────┼──────────────┤
│ 97.5 │ 7 │
├────────────┼──────────────┤
│ 99 │ 10 │
├────────────┼──────────────┤
│ 99.9 │ 17 │
├────────────┼──────────────┤
│ 99.99 │ 20 │
├────────────┼──────────────┤
│ 99.999 │ 23 │
└────────────┴──────────────┘
61k requests in 60.03s, 21.4 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
10,000 clients subscribed, 64.04s
┌──────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ Delivery │ 0.71 ms │ 0.94 ms │ 3.86 ms │ 6.54 ms │ 1.14 ms │ 1.08 ms │ 21.25 ms │
└──────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┴──────────┘
┌───────────┬────┬──────┬───────┬───────┬───────┬────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼───────┼───────┼───────┼────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 1,000 │ 1,000 │ 951.8 │ 213.87 │ 0 │
└───────────┴────┴──────┴───────┴───────┴───────┴────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
60k notifications received in 64.04s (60,010 of 60,000 expected), 10.7 MB read
Calls / second
21,628
1,297,651 calls in 60 s, 100 connections
Notifications / second
21,208
1,297,750 received by 10,000 clients
Delivery p50
4.33ms
average 4.47 ms
Delivery p99
7.77ms
max 45.8 ms
Not delivered
0
0 calls failed
Server during this run API Maker 6.4 vCPU · Redis 0.3 vCPU · whole server busy 88 % · load generator busy 11 %
$ autocannon -c 100 -d 60 -w 10 -l -m POST -b '{"name":"order-updates","eventData":{"recipientId":"<id of a client>","t":<now>,"type":"order-updated","order_no":1001,"status":"SHIPPED"}}' -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" -H "content-type: application/json" "http://<server>:38246/api/system-api/bench/emit-event-ws"
Running 60s test @ http://<server>:38246/api/system-api/bench/emit-event-ws
100 connections
10 workers
┌─────────┬──────┬──────┬───────┬──────┬────────┬─────────┬───────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼──────┼───────┼──────┼────────┼─────────┼───────┤
│ Latency │ 2 ms │ 4 ms │ 6 ms │ 8 ms │ 4.1 ms │ 1.36 ms │ 52 ms │
└─────────┴──────┴──────┴───────┴──────┴────────┴─────────┴───────┘
┌───────────┬─────────┬─────────┬─────────┬─────────┬───────────┬──────────┬─────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼─────────┼─────────┼─────────┼─────────┼───────────┼──────────┼─────────┤
│ Req/Sec │ 10,303 │ 12,919 │ 21,983 │ 23,727 │ 21,627.47 │ 2,180.19 │ 10,297 │
├───────────┼─────────┼─────────┼─────────┼─────────┼───────────┼──────────┼─────────┤
│ Bytes/Sec │ 3.68 MB │ 4.61 MB │ 7.85 MB │ 8.47 MB │ 7.72 MB │ 778 kB │ 3.68 MB │
└───────────┴─────────┴─────────┴─────────┴─────────┴───────────┴──────────┴─────────┘
Req/Bytes counts sampled once per second.
# of samples: 600
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 0 │
├────────────┼──────────────┤
│ 0.01 │ 1 │
├────────────┼──────────────┤
│ 0.1 │ 1 │
├────────────┼──────────────┤
│ 1 │ 2 │
├────────────┼──────────────┤
│ 2.5 │ 2 │
├────────────┼──────────────┤
│ 10 │ 3 │
├────────────┼──────────────┤
│ 25 │ 3 │
├────────────┼──────────────┤
│ 50 │ 4 │
├────────────┼──────────────┤
│ 75 │ 5 │
├────────────┼──────────────┤
│ 90 │ 5 │
├────────────┼──────────────┤
│ 97.5 │ 6 │
├────────────┼──────────────┤
│ 99 │ 8 │
├────────────┼──────────────┤
│ 99.9 │ 19 │
├────────────┼──────────────┤
│ 99.99 │ 29 │
├────────────┼──────────────┤
│ 99.999 │ 39 │
└────────────┴──────────────┘
1298k requests in 60.01s, 463 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
10,000 clients subscribed, 64.20s
┌──────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼──────────┤
│ Delivery │ 2.76 ms │ 4.33 ms │ 6.72 ms │ 7.77 ms │ 4.47 ms │ 1.31 ms │ 45.76 ms │
└──────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┴──────────┘
┌───────────┬────┬──────┬────────┬────────┬──────────┬─────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼────────┼────────┼──────────┼─────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 21,941 │ 23,650 │ 20,741.1 │ 4670.40 │ 0 │
└───────────┴────┴──────┴────────┴────────┴──────────┴─────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
1.30M notifications received in 64.20s (1,297,750 of 1,297,651 expected), 232.4 MB read
A broadcast¶
1,000 more clients subscribe to an event without a condition : every call of the emit event WS API reaches all 1,000 of them.
Calls / second (paced)
5
300 calls in 60 s, 1 connection
Notifications / second
4,994
300,000 received by 1,000 clients
Delivery p50
8.70ms
average 9.36 ms
Delivery p99
19.9ms
max 43.6 ms
Not delivered
0
0 calls failed
Server during this run API Maker 0.2 vCPU · Redis 0.0 vCPU · whole server busy 3 % · load generator busy 4 %
$ autocannon -c 1 -d 60 -R 5 -l -m POST -b '{"name":"announcements","eventData":{"t":<now>,"type":"announcement","text":"Hello from API Maker"}}' -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" -H "content-type: application/json" "http://<server>:38246/api/system-api/bench/emit-event-ws"
Running 60s test @ http://<server>:38246/api/system-api/bench/emit-event-ws
1 connections
┌─────────┬──────┬──────┬───────┬───────┬─────────┬─────────┬───────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼──────┼───────┼───────┼─────────┼─────────┼───────┤
│ Latency │ 1 ms │ 8 ms │ 18 ms │ 20 ms │ 8.77 ms │ 5.22 ms │ 44 ms │
└─────────┴──────┴──────┴───────┴───────┴─────────┴─────────┴───────┘
┌───────────┬────────┬────────┬────────┬────────┬────────┬───────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────────┼────────┼────────┼────────┼────────┼───────┼────────┤
│ Req/Sec │ 5 │ 5 │ 5 │ 5 │ 5 │ 0 │ 5 │
├───────────┼────────┼────────┼────────┼────────┼────────┼───────┼────────┤
│ Bytes/Sec │ 1.8 kB │ 1.8 kB │ 1.8 kB │ 1.8 kB │ 1.8 kB │ 0 B │ 1.8 kB │
└───────────┴────────┴────────┴────────┴────────┴────────┴───────┴────────┘
Req/Bytes counts sampled once per second.
# of samples: 60
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 1 │
├────────────┼──────────────┤
│ 0.01 │ 1 │
├────────────┼──────────────┤
│ 0.1 │ 1 │
├────────────┼──────────────┤
│ 1 │ 1 │
├────────────┼──────────────┤
│ 2.5 │ 1 │
├────────────┼──────────────┤
│ 10 │ 2 │
├────────────┼──────────────┤
│ 25 │ 4 │
├────────────┼──────────────┤
│ 50 │ 8 │
├────────────┼──────────────┤
│ 75 │ 13 │
├────────────┼──────────────┤
│ 90 │ 15 │
├────────────┼──────────────┤
│ 97.5 │ 18 │
├────────────┼──────────────┤
│ 99 │ 20 │
├────────────┼──────────────┤
│ 99.9 │ 40 │
├────────────┼──────────────┤
│ 99.99 │ 44 │
├────────────┼──────────────┤
│ 99.999 │ 44 │
└────────────┴──────────────┘
305 requests in 60.07s, 108 kB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
1,000 clients subscribed, 63.08s
┌──────────┬─────────┬────────┬──────────┬──────────┬─────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼─────────┼────────┼──────────┼──────────┼─────────┼─────────┼──────────┤
│ Delivery │ 4.58 ms │ 8.7 ms │ 17.44 ms │ 19.94 ms │ 9.36 ms │ 3.71 ms │ 43.62 ms │
└──────────┴─────────┴────────┴──────────┴──────────┴─────────┴─────────┴──────────┘
┌───────────┬────┬──────┬───────┬───────┬─────────┬────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼───────┼───────┼─────────┼────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 5,000 │ 5,000 │ 4,836.1 │ 890.39 │ 0 │
└───────────┴────┴──────┴───────┴───────┴─────────┴────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 63
300k notifications received in 63.08s (300,000 of 300,000 expected), 46.0 MB read
Calls / second
199
11,947 calls in 60 s, 10 connections
Notifications / second
196,995
11,957,000 received by 1,000 clients
Delivery p50
40.4ms
average 41.0 ms
Delivery p99
69.4ms
max 152 ms
Not delivered
0
0 calls failed
Server during this run API Maker 6.2 vCPU · Redis 0.3 vCPU · whole server busy 86 % · load generator busy 14 %
$ autocannon -c 10 -d 60 -w 10 -l -m POST -b '{"name":"announcements","eventData":{"t":<now>,"type":"announcement","text":"Hello from API Maker"}}' -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" -H "content-type: application/json" "http://<server>:38246/api/system-api/bench/emit-event-ws"
Running 60s test @ http://<server>:38246/api/system-api/bench/emit-event-ws
10 connections
10 workers
┌─────────┬───────┬───────┬───────┬───────┬──────────┬──────────┬────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼───────┼───────┼───────┼───────┼──────────┼──────────┼────────┤
│ Latency │ 32 ms │ 49 ms │ 71 ms │ 77 ms │ 49.65 ms │ 10.48 ms │ 281 ms │
└─────────┴───────┴───────┴───────┴───────┴──────────┴──────────┴────────┘
┌───────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┬─────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┤
│ Req/Sec │ 149 │ 155 │ 196 │ 245 │ 199.12 │ 19.47 │ 149 │
├───────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┼─────────┤
│ Bytes/Sec │ 53.7 kB │ 55.8 kB │ 70.6 kB │ 88.3 kB │ 71.7 kB │ 7.01 kB │ 53.6 kB │
└───────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┴─────────┘
Req/Bytes counts sampled once per second.
# of samples: 600
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 18 │
├────────────┼──────────────┤
│ 0.01 │ 18 │
├────────────┼──────────────┤
│ 0.1 │ 23 │
├────────────┼──────────────┤
│ 1 │ 28 │
├────────────┼──────────────┤
│ 2.5 │ 32 │
├────────────┼──────────────┤
│ 10 │ 38 │
├────────────┼──────────────┤
│ 25 │ 43 │
├────────────┼──────────────┤
│ 50 │ 49 │
├────────────┼──────────────┤
│ 75 │ 55 │
├────────────┼──────────────┤
│ 90 │ 62 │
├────────────┼──────────────┤
│ 97.5 │ 71 │
├────────────┼──────────────┤
│ 99 │ 77 │
├────────────┼──────────────┤
│ 99.9 │ 114 │
├────────────┼──────────────┤
│ 99.99 │ 267 │
├────────────┼──────────────┤
│ 99.999 │ 281 │
└────────────┴──────────────┘
12k requests in 60.01s, 4.3 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
1,000 clients subscribed, 63.70s
┌──────────┬──────────┬──────────┬──────────┬──────────┬──────────┬──────────┬───────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼──────────┼──────────┼──────────┼──────────┼──────────┼──────────┼───────────┤
│ Delivery │ 22.45 ms │ 40.38 ms │ 62.82 ms │ 69.38 ms │ 40.99 ms │ 10.27 ms │ 152.06 ms │
└──────────┴──────────┴──────────┴──────────┴──────────┴──────────┴──────────┴───────────┘
┌───────────┬────┬──────┬─────────┬─────────┬───────────┬──────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼─────────┼─────────┼───────────┼──────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 192,532 │ 245,262 │ 191,659.5 │ 41318.09 │ 0 │
└───────────┴────┴──────┴─────────┴─────────┴───────────┴──────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
11.96M notifications received in 63.70s (11,957,000 of 11,947,000 expected), 1834.6 MB read
Rows inserted in a table¶
100 clients subscribe to the insert API of a table (SCHEMA_POST_BULK_INSERT on inserts_public, getEventData: true) ; autocannon inserts rows of the dataset through the insert API, and every row saved is told to each of the 100 clients, with its columns.
Calls / second (paced)
50
3,000 calls in 60 s, 10 connections
Notifications / second
4,930
301,000 received by 100 clients
Delivery p50
13.4ms
average 14.1 ms
Delivery p99
35.5ms
max 50.0 ms
Not delivered
0
0 calls failed
Server during this run API Maker 0.2 vCPU · Redis 0.0 vCPU · MongoDB 0.1 vCPU · whole server busy 4 % · load generator busy 5 %
$ autocannon -c 10 -d 60 -R 50 -l -m POST -b '{"customer_id":1,"first_name":"BENCH","last_name":"INSERT","phone":<now>,"last_update":"2006-02-15T04:34:00.330Z","pincode":111111,"shipping_id":2,"dob":"2022-10-30T03:25:03.000Z","country":"India"}' -H "content-type: application/json" "http://<server>:38246/api/schema/bench/mongodb/am_bench/inserts_public/save-single-or-multiple"
Running 60s test @ http://<server>:38246/api/schema/bench/mongodb/am_bench/inserts_public/save-single-or-multiple
10 connections
┌─────────┬──────┬──────┬───────┬───────┬─────────┬─────────┬───────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼──────┼───────┼───────┼─────────┼─────────┼───────┤
│ Latency │ 1 ms │ 4 ms │ 15 ms │ 20 ms │ 5.14 ms │ 3.79 ms │ 31 ms │
└─────────┴──────┴──────┴───────┴───────┴─────────┴─────────┴───────┘
┌───────────┬─────────┬─────────┬─────────┬─────────┬─────────┬────────┬─────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼─────────┼─────────┼─────────┼─────────┼─────────┼────────┼─────────┤
│ Req/Sec │ 50 │ 50 │ 50 │ 50 │ 50 │ 0 │ 50 │
├───────────┼─────────┼─────────┼─────────┼─────────┼─────────┼────────┼─────────┤
│ Bytes/Sec │ 30.2 kB │ 30.2 kB │ 30.3 kB │ 30.3 kB │ 30.2 kB │ 4.43 B │ 30.2 kB │
└───────────┴─────────┴─────────┴─────────┴─────────┴─────────┴────────┴─────────┘
Req/Bytes counts sampled once per second.
# of samples: 60
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 1 │
├────────────┼──────────────┤
│ 0.01 │ 1 │
├────────────┼──────────────┤
│ 0.1 │ 1 │
├────────────┼──────────────┤
│ 1 │ 1 │
├────────────┼──────────────┤
│ 2.5 │ 1 │
├────────────┼──────────────┤
│ 10 │ 1 │
├────────────┼──────────────┤
│ 25 │ 2 │
├────────────┼──────────────┤
│ 50 │ 4 │
├────────────┼──────────────┤
│ 75 │ 7 │
├────────────┼──────────────┤
│ 90 │ 9 │
├────────────┼──────────────┤
│ 97.5 │ 15 │
├────────────┼──────────────┤
│ 99 │ 20 │
├────────────┼──────────────┤
│ 99.9 │ 27 │
├────────────┼──────────────┤
│ 99.99 │ 30 │
├────────────┼──────────────┤
│ 99.999 │ 31 │
└────────────┴──────────────┘
3k requests in 60.04s, 1.81 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
100 clients subscribed, 64.06s
┌──────────┬─────────┬──────────┬──────────┬──────────┬──────────┬─────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼─────────┼──────────┼──────────┼──────────┼──────────┼─────────┼──────────┤
│ Delivery │ 7.55 ms │ 13.42 ms │ 25.98 ms │ 35.55 ms │ 14.13 ms │ 4.86 ms │ 50.05 ms │
└──────────┴─────────┴──────────┴──────────┴──────────┴──────────┴─────────┴──────────┘
┌───────────┬────┬──────┬───────┬───────┬─────────┬─────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼───────┼───────┼─────────┼─────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 5,000 │ 5,000 │ 4,774.2 │ 1006.74 │ 0 │
└───────────┴────┴──────┴───────┴───────┴─────────┴─────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
301k notifications received in 64.06s (301,000 of 300,000 expected), 94.4 MB read
Calls / second
1,396
83,727 calls in 60 s, 100 connections
Notifications / second
136,942
8,382,200 received by 100 clients
Delivery p50
246ms
average 248 ms
Delivery p99
332ms
max 538 ms
Not delivered
0
0 calls failed
Server during this run API Maker 4.8 vCPU · Redis 0.2 vCPU · MongoDB 1.2 vCPU · whole server busy 85 % · load generator busy 9 %
$ autocannon -c 100 -d 60 -w 10 -l -m POST -b '{"customer_id":1,"first_name":"BENCH","last_name":"INSERT","phone":<now>,"last_update":"2006-02-15T04:34:00.330Z","pincode":111111,"shipping_id":2,"dob":"2022-10-30T03:25:03.000Z","country":"India"}' -H "content-type: application/json" "http://<server>:38246/api/schema/bench/mongodb/am_bench/inserts_public/save-single-or-multiple"
Running 60s test @ http://<server>:38246/api/schema/bench/mongodb/am_bench/inserts_public/save-single-or-multiple
100 connections
10 workers
┌─────────┬───────┬───────┬────────┬────────┬─────────┬──────────┬────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼───────┼───────┼────────┼────────┼─────────┼──────────┼────────┤
│ Latency │ 46 ms │ 70 ms │ 101 ms │ 111 ms │ 71.1 ms │ 14.23 ms │ 218 ms │
└─────────┴───────┴───────┴────────┴────────┴─────────┴──────────┴────────┘
┌───────────┬────────┬────────┬────────┬────────┬──────────┬─────────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────────┼────────┼────────┼────────┼──────────┼─────────┼────────┤
│ Req/Sec │ 969 │ 1,221 │ 1,386 │ 1,637 │ 1,395.45 │ 131.33 │ 969 │
├───────────┼────────┼────────┼────────┼────────┼──────────┼─────────┼────────┤
│ Bytes/Sec │ 586 kB │ 739 kB │ 839 kB │ 991 kB │ 844 kB │ 79.4 kB │ 586 kB │
└───────────┴────────┴────────┴────────┴────────┴──────────┴─────────┴────────┘
Req/Bytes counts sampled once per second.
# of samples: 600
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 8 │
├────────────┼──────────────┤
│ 0.01 │ 11 │
├────────────┼──────────────┤
│ 0.1 │ 27 │
├────────────┼──────────────┤
│ 1 │ 42 │
├────────────┼──────────────┤
│ 2.5 │ 46 │
├────────────┼──────────────┤
│ 10 │ 55 │
├────────────┼──────────────┤
│ 25 │ 62 │
├────────────┼──────────────┤
│ 50 │ 70 │
├────────────┼──────────────┤
│ 75 │ 79 │
├────────────┼──────────────┤
│ 90 │ 88 │
├────────────┼──────────────┤
│ 97.5 │ 101 │
├────────────┼──────────────┤
│ 99 │ 111 │
├────────────┼──────────────┤
│ 99.9 │ 155 │
├────────────┼──────────────┤
│ 99.99 │ 185 │
├────────────┼──────────────┤
│ 99.999 │ 218 │
└────────────┴──────────────┘
84k requests in 60.02s, 50.6 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
100 clients subscribed, 64.22s
┌──────────┬───────────┬───────────┬───────────┬───────────┬───────────┬──────────┬───────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼───────────┼───────────┼───────────┼───────────┼───────────┼──────────┼───────────┤
│ Delivery │ 196.48 ms │ 246.27 ms │ 308.48 ms │ 332.03 ms │ 247.98 ms │ 33.43 ms │ 538.11 ms │
└──────────┴───────────┴───────────┴───────────┴───────────┴───────────┴──────────┴───────────┘
┌───────────┬────┬──────┬─────────┬─────────┬───────────┬──────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼─────────┼─────────┼───────────┼──────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 137,554 │ 164,509 │ 133,707.5 │ 29121.54 │ 0 │
└───────────┴────┴──────┴─────────┴─────────┴───────────┴──────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
8.38M notifications received in 64.22s (8,382,200 of 8,372,700 expected), 2629.1 MB read
With every client connected¶
The same runs once more, with 3,662,564 clients connected and waiting : what a server which is full of WebSocket clients still does.
| No client, or 10,000 | 3,662,564 clients connected | |
|---|---|---|
| A notification for one person, 1,000 a second : delivery p50 | 0.94 ms | 1.28 ms |
| … p99 | 6.54 ms | 121 ms |
| A notification for one person, as many as the server takes | 21,208 / s | 8,384 / s |
| Get all with both tokens, 100 connections (autocannon) | 9,529 req/s | 3,997 req/s |
| … latency p50 / p99 | 10 ms / 21 ms | 14 ms / 289 ms |
Calls / second (paced)
987
59,220 calls in 60 s, 10 connections
Notifications / second
970
59,225 received by 3,662,564 clients
Delivery p50
1.28ms
average 4.51 ms
Delivery p99
121ms
max 454 ms
Not delivered
0
0 calls failed
Server during this run API Maker 3.5 vCPU · Redis 0.9 vCPU · MongoDB 0.0 vCPU · sandboxes 0.0 vCPU · whole server busy 60 % · load generator busy 8 %
$ autocannon -c 10 -d 60 -R 1000 -l -m POST -b '{"name":"order-updates","eventData":{"recipientId":"<id of a client>","t":<now>,"type":"order-updated","order_no":1001,"status":"SHIPPED"}}' -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" -H "content-type: application/json" "http://<server>:38246/api/system-api/bench/emit-event-ws"
Running 60s test @ http://<server>:38246/api/system-api/bench/emit-event-ws
10 connections
┌─────────┬──────┬───────┬────────┬────────┬──────────┬──────────┬────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼───────┼────────┼────────┼──────────┼──────────┼────────┤
│ Latency │ 1 ms │ 27 ms │ 248 ms │ 291 ms │ 63.77 ms │ 76.63 ms │ 454 ms │
└─────────┴──────┴───────┴────────┴────────┴──────────┴──────────┴────────┘
┌───────────┬────────┬────────┬────────┬────────┬────────┬─────────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────────┼────────┼────────┼────────┼────────┼─────────┼────────┤
│ Req/Sec │ 490 │ 708 │ 1,000 │ 1,010 │ 987 │ 74.78 │ 490 │
├───────────┼────────┼────────┼────────┼────────┼────────┼─────────┼────────┤
│ Bytes/Sec │ 175 kB │ 253 kB │ 357 kB │ 361 kB │ 352 kB │ 26.7 kB │ 175 kB │
└───────────┴────────┴────────┴────────┴────────┴────────┴─────────┴────────┘
Req/Bytes counts sampled once per second.
# of samples: 60
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 0 │
├────────────┼──────────────┤
│ 0.01 │ 0 │
├────────────┼──────────────┤
│ 0.1 │ 0 │
├────────────┼──────────────┤
│ 1 │ 0 │
├────────────┼──────────────┤
│ 2.5 │ 1 │
├────────────┼──────────────┤
│ 10 │ 1 │
├────────────┼──────────────┤
│ 25 │ 2 │
├────────────┼──────────────┤
│ 50 │ 27 │
├────────────┼──────────────┤
│ 75 │ 109 │
├────────────┼──────────────┤
│ 90 │ 180 │
├────────────┼──────────────┤
│ 97.5 │ 248 │
├────────────┼──────────────┤
│ 99 │ 291 │
├────────────┼──────────────┤
│ 99.9 │ 425 │
├────────────┼──────────────┤
│ 99.99 │ 451 │
├────────────┼──────────────┤
│ 99.999 │ 453 │
└────────────┴──────────────┘
60k requests in 60.03s, 21.1 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
3,662,564 clients subscribed, 64.05s
┌──────────┬─────────┬─────────┬──────────┬───────────┬─────────┬──────────┬──────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼─────────┼─────────┼──────────┼───────────┼─────────┼──────────┼──────────┤
│ Delivery │ 0.79 ms │ 1.28 ms │ 24.11 ms │ 121.41 ms │ 4.51 ms │ 22.86 ms │ 454.4 ms │
└──────────┴─────────┴─────────┴──────────┴───────────┴─────────┴──────────┴──────────┘
┌───────────┬────┬──────┬───────┬───────┬───────┬────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼───────┼───────┼───────┼────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 1,000 │ 1,010 │ 939.1 │ 223.73 │ 0 │
└───────────┴────┴──────┴───────┴───────┴───────┴────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
59k notifications received in 64.05s (59,225 of 59,220 expected), 10.7 MB read
Calls / second
8,481
508,854 calls in 60 s, 100 connections
Notifications / second
8,384
508,954 received by 3,662,564 clients
Delivery p50
5.85ms
average 11.6 ms
Delivery p99
194ms
max 621 ms
Not delivered
0
0 calls failed
Server during this run API Maker 6.6 vCPU · Redis 0.2 vCPU · MongoDB 0.0 vCPU · sandboxes 0.0 vCPU · whole server busy 91 % · load generator busy 17 %
$ autocannon -c 100 -d 60 -w 10 -l -m POST -b '{"name":"order-updates","eventData":{"recipientId":"<id of a client>","t":<now>,"type":"order-updated","order_no":1001,"status":"SHIPPED"}}' -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" -H "content-type: application/json" "http://<server>:38246/api/system-api/bench/emit-event-ws"
Running 60s test @ http://<server>:38246/api/system-api/bench/emit-event-ws
100 connections
10 workers
┌─────────┬──────┬──────┬───────┬────────┬──────────┬──────────┬────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼──────┼───────┼────────┼──────────┼──────────┼────────┤
│ Latency │ 3 ms │ 5 ms │ 66 ms │ 195 ms │ 11.27 ms │ 32.11 ms │ 496 ms │
└─────────┴──────┴──────┴───────┴────────┴──────────┴──────────┴────────┘
┌───────────┬────────┬─────────┬─────────┬─────────┬──────────┬──────────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────────┼─────────┼─────────┼─────────┼──────────┼──────────┼────────┤
│ Req/Sec │ 3,069 │ 4,643 │ 8,591 │ 10,215 │ 8,481.09 │ 1,234.13 │ 3,069 │
├───────────┼────────┼─────────┼─────────┼─────────┼──────────┼──────────┼────────┤
│ Bytes/Sec │ 1.1 MB │ 1.66 MB │ 3.07 MB │ 3.65 MB │ 3.03 MB │ 441 kB │ 1.1 MB │
└───────────┴────────┴─────────┴─────────┴─────────┴──────────┴──────────┴────────┘
Req/Bytes counts sampled once per second.
# of samples: 600
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 0 │
├────────────┼──────────────┤
│ 0.01 │ 1 │
├────────────┼──────────────┤
│ 0.1 │ 1 │
├────────────┼──────────────┤
│ 1 │ 3 │
├────────────┼──────────────┤
│ 2.5 │ 3 │
├────────────┼──────────────┤
│ 10 │ 4 │
├────────────┼──────────────┤
│ 25 │ 5 │
├────────────┼──────────────┤
│ 50 │ 5 │
├────────────┼──────────────┤
│ 75 │ 7 │
├────────────┼──────────────┤
│ 90 │ 8 │
├────────────┼──────────────┤
│ 97.5 │ 66 │
├────────────┼──────────────┤
│ 99 │ 195 │
├────────────┼──────────────┤
│ 99.9 │ 389 │
├────────────┼──────────────┤
│ 99.99 │ 459 │
├────────────┼──────────────┤
│ 99.999 │ 490 │
└────────────┴──────────────┘
509k requests in 60.01s, 182 MB read
$ am_ws_load listen "ws://<server>:38246/?x-am-authorization=<token>&x-am-user-authorization=<token>"
3,662,564 clients subscribed, 63.71s
┌──────────┬─────────┬─────────┬──────────┬───────────┬──────────┬──────────┬───────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├──────────┼─────────┼─────────┼──────────┼───────────┼──────────┼──────────┼───────────┤
│ Delivery │ 3.65 ms │ 5.85 ms │ 65.98 ms │ 194.43 ms │ 11.58 ms │ 31.99 ms │ 621.06 ms │
└──────────┴─────────┴─────────┴──────────┴───────────┴──────────┴──────────┴───────────┘
┌───────────┬────┬──────┬───────┬────────┬─────────┬─────────┬─────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼────┼──────┼───────┼────────┼─────────┼─────────┼─────┤
│ Notif/Sec │ 0 │ 0 │ 8,416 │ 10,294 │ 8,130.0 │ 2005.53 │ 0 │
└───────────┴────┴──────┴───────┴────────┴─────────┴─────────┴─────┘
Delivery : from the moment the request is written to the moment the client reads the notification.
# of samples: 64
509k notifications received in 63.71s (508,954 of 508,854 expected), 92.4 MB read
Requests / second
3,997
239,825 requests in 60 s
Latency p50
14ms
average 24.52 ms
Latency p99
289ms
max 590 ms
Errors
0
non-2xx, errors, timeouts
Server during this run API Maker 5.3 vCPU · Redis 0.0 vCPU · MongoDB 1.4 vCPU · sandboxes 0.0 vCPU · whole server busy 94 % · load generator busy 13 %
$ autocannon -c 100 -d 60 -w 10 -l -H "x-am-authorization: <token>" -H "x-am-user-authorization: <token>" "http://<server>:38246/api/schema/bench/mongodb/am_bench/customers"
Running 60s test @ http://<server>:38246/api/schema/bench/mongodb/am_bench/customers
100 connections
10 workers
┌─────────┬──────┬───────┬────────┬────────┬──────────┬──────────┬────────┐
│ Stat │ 2.5% │ 50% │ 97.5% │ 99% │ Avg │ Stdev │ Max │
├─────────┼──────┼───────┼────────┼────────┼──────────┼──────────┼────────┤
│ Latency │ 6 ms │ 14 ms │ 188 ms │ 289 ms │ 24.52 ms │ 46.55 ms │ 590 ms │
└─────────┴──────┴───────┴────────┴────────┴──────────┴──────────┴────────┘
┌───────────┬─────────┬─────────┬─────────┬─────────┬──────────┬─────────┬────────┐
│ Stat │ 1% │ 2.5% │ 50% │ 97.5% │ Avg │ Stdev │ Min │
├───────────┼─────────┼─────────┼─────────┼─────────┼──────────┼─────────┼────────┤
│ Req/Sec │ 2,049 │ 3,213 │ 4,051 │ 4,567 │ 3,997.44 │ 432.42 │ 2,049 │
├───────────┼─────────┼─────────┼─────────┼─────────┼──────────┼─────────┼────────┤
│ Bytes/Sec │ 5.61 MB │ 8.79 MB │ 11.1 MB │ 12.5 MB │ 10.9 MB │ 1.18 MB │ 5.6 MB │
└───────────┴─────────┴─────────┴─────────┴─────────┴──────────┴─────────┴────────┘
Req/Bytes counts sampled once per second.
# of samples: 600
┌────────────┬──────────────┐
│ Percentile │ Latency (ms) │
├────────────┼──────────────┤
│ 0.001 │ 1 │
├────────────┼──────────────┤
│ 0.01 │ 1 │
├────────────┼──────────────┤
│ 0.1 │ 3 │
├────────────┼──────────────┤
│ 1 │ 5 │
├────────────┼──────────────┤
│ 2.5 │ 6 │
├────────────┼──────────────┤
│ 10 │ 8 │
├────────────┼──────────────┤
│ 25 │ 11 │
├────────────┼──────────────┤
│ 50 │ 14 │
├────────────┼──────────────┤
│ 75 │ 18 │
├────────────┼──────────────┤
│ 90 │ 31 │
├────────────┼──────────────┤
│ 97.5 │ 188 │
├────────────┼──────────────┤
│ 99 │ 289 │
├────────────┼──────────────┤
│ 99.9 │ 427 │
├────────────┼──────────────┤
│ 99.99 │ 507 │
├────────────┼──────────────┤
│ 99.999 │ 573 │
└────────────┴──────────────┘
240k requests in 60.02s, 656 MB read
Questions¶
How many WebSocket connections can API Maker hold on 8 shared vCPUs and 32 GB ?¶
3,662,564 clients were connected at the same time on this server, each with both tokens and a subscription of its own, with MongoDB, Redis and two sandboxes on the same machine. Memory is what ends first : a client costs about 8.8 KB of the server in all.
How much memory does a WebSocket client cost ?¶
About 8.8 KB : 3.2 KB in the API Maker process, 4.5 KB in the Linux kernel (its socket) and 1.1 KB in Redis (its subscription). Measured between 1,000,000 and 3,000,000 clients which wait, each connected with both tokens and one subscription.
How many clients can connect each second ?¶
10,939 clients a second connected with both tokens, subscribed and left, 100 at a time ; 24,719 a second without a subscription. With a can user connect code on the event : 9,280 a second.
How fast does a notification reach a client ?¶
At 1,000 notifications a second, each for one person among 10,000 : 0.94 ms from the HTTP call to the client (p50), 6.54 ms for 99 % of them. With as many calls as the server takes : 21,208 notifications a second.
Do connected WebSocket clients slow the APIs down ?¶
Get all with both tokens answered 9,529 requests a second with no WebSocket client, and 3,997 with 3,662,564 clients connected and waiting. A client which waits costs memory ; its CPU is a ping a minute.