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denoland-deno/tests/node_compat/test/parallel/test-net-socket-setnodelay.js
Divy Srivastava c7153838ec
fix(ext/node): implement TCP.setNoDelay (#26263)
Fixes https://github.com/denoland/deno/issues/26177

The significant delay was caused by Nagel's algorithm + delayed ACKs in
Linux kernels. Here's the [kernel
patch](https://lwn.net/Articles/502585/) which added 40ms
`tcp_default_delack_min`

```
$ deno run -A pg-bench.mjs # main
Tue Oct 15 2024 12:27:22 GMT+0530 (India Standard Time): 42ms

$ target/release/deno run -A pg-bench.mjs # this patch
Tue Oct 15 2024 12:28:02 GMT+0530 (India Standard Time): 1ms
```

```js
import { Buffer } from "node:buffer";

import pg from 'pg'
const { Client } = pg
const client = new Client({
    connectionString: 'postgresql://postgres:postgres@127.0.0.1:5432/postgres'
})
await client.connect()

async function fetch() {
    const startPerf = performance.now();
    const res = await client.query(`select
        $1::int as int,
        $2 as string,
        $3::timestamp with time zone as timestamp,
        $4 as null,
        $5::bool as boolean,
        $6::bytea as bytea,
        $7::jsonb as json
      `, [
        1337,
        'wat',
        new Date().toISOString(),
        null,
        false,
        Buffer.from('awesome'),
        JSON.stringify([{ some: 'json' }, { array: 'object' }])
    ])
    console.log(`${new Date()}: ${Math.round(performance.now() - startPerf)}ms`)
}

for(;;) await fetch();
```
2024-10-15 14:47:12 +05:30

63 lines
1.6 KiB
JavaScript

// deno-fmt-ignore-file
// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 18.12.1
// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');
const truthyValues = [true, 1, 'true', {}, []];
const falseyValues = [false, 0, ''];
const genSetNoDelay = (desiredArg) => (enable) => {
assert.strictEqual(enable, desiredArg);
};
// setNoDelay should default to true
let socket = new net.Socket({
handle: {
setNoDelay: common.mustCall(genSetNoDelay(true)),
readStart() {}
}
});
socket.setNoDelay();
socket = new net.Socket({
handle: {
setNoDelay: common.mustCall(genSetNoDelay(true), 1),
readStart() {}
}
});
truthyValues.forEach((testVal) => socket.setNoDelay(testVal));
socket = new net.Socket({
handle: {
setNoDelay: common.mustNotCall(),
readStart() {}
}
});
falseyValues.forEach((testVal) => socket.setNoDelay(testVal));
socket = new net.Socket({
handle: {
setNoDelay: common.mustCall(3),
readStart() {}
}
});
truthyValues.concat(falseyValues).concat(truthyValues)
.forEach((testVal) => socket.setNoDelay(testVal));
// If a handler doesn't have a setNoDelay function it shouldn't be called.
// In the case below, if it is called an exception will be thrown
socket = new net.Socket({
handle: {
setNoDelay: null,
readStart() {}
}
});
const returned = socket.setNoDelay(true);
assert.ok(returned instanceof net.Socket);