mirror of
https://github.com/denoland/deno.git
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76 lines
1.7 KiB
JavaScript
76 lines
1.7 KiB
JavaScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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import { fork } from "node:child_process";
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import process from "node:process";
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import { setImmediate } from "node:timers";
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if (process.env.CHILD) {
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const len = +process.env.CHILD;
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const msg = ".".repeat(len);
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let waiting = false;
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const send = () => {
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while (
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process.send(msg, undefined, undefined, (_e) => {
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if (waiting) {
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waiting = false;
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setImmediate(send);
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}
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})
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);
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// Wait: backlog of unsent messages exceeds threshold
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// once the message is sent, the callback will be called
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// and we'll resume
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waiting = true;
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};
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send();
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} else {
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function main(dur, len) {
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const p = new Promise((resolve) => {
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const start = performance.now();
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const options = {
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"stdio": ["inherit", "inherit", "inherit", "ipc"],
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"env": { "CHILD": len.toString() },
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};
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const path = new URL("child_process_ipc.mjs", import.meta.url).pathname;
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const child = fork(
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path,
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options,
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);
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let bytes = 0;
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let total = 0;
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child.on("message", (msg) => {
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bytes += msg.length;
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total += 1;
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});
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setTimeout(() => {
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child.kill();
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const end = performance.now();
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const mb = bytes / 1024 / 1024;
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const sec = (end - start) / 1000;
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const mbps = mb / sec;
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console.log(`${len} bytes: ${mbps.toFixed(2)} MB/s`);
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console.log(`${total} messages`);
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resolve();
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}, dur * 1000);
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});
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return p;
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}
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const len = [
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64,
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256,
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1024,
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4096,
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16384,
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65536,
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65536 << 4,
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65536 << 6 - 1,
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];
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for (const l of len) {
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await main(5, l);
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}
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}
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