node/benchmark/webstreams/readable-async-iterator.js at main · nodejs/node

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node/benchmark/webstreams/readable-async-iterator.js at main · nodejs/node · GitHub

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'use strict';

const common = require('../common.js');

const {

ReadableStream,

} = require('node:stream/web');

const bench = common.createBenchmark(main, {

n: [1e5],

type: ['normal', 'bytes'],

});

async function main({ n, type }) {

const rs = type === 'bytes' ?

new ReadableStream({

type: 'bytes',

pull: function(controller) {

controller.enqueue(new Uint8Array(1));

}) :

new ReadableStream({

pull: function(controller) {

controller.enqueue(1);

});

let x = 0;

bench.start();

if (type === 'bytes') {

for await (const chunk of rs) {

x += chunk.byteLength;

if (x > n) {

break;

}

} else {

for await (const chunk of rs) {

x += chunk;

if (x > n) {

break;

}

// Use x to ensure V8 does not optimize away the loop as a noop.

console.assert(x);

bench.end(n);

}

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