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nodejs/benchmark/child_process/child-process-read.js
Rich Trott 29e74d4952 benchmark: refactor for consistent style
Code in benchmark directory sometimes uses `function () {}` for
anonymous callbacks and sometimes uses `() => {}`. Multi-line arrays
sometimes have a trailing comma and sometimes do not. Update to always
use arrow functions for anonymous callbacks and trailing commas for
multiline arrays.

PR-URL: https://github.com/nodejs/node/pull/25944
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2019-02-06 22:18:31 -08:00

43 lines
1.1 KiB
JavaScript

'use strict';
const common = require('../common.js');
// This benchmark uses `yes` to a create noisy child_processes with varying
// output message lengths, and tries to read 8GB of output
const os = require('os');
const child_process = require('child_process');
const messagesLength = [64, 256, 1024, 4096];
// Windows does not support that long arguments
if (os.platform() !== 'win32')
messagesLength.push(32768);
const bench = common.createBenchmark(main, {
len: messagesLength,
dur: [5]
});
function main({ dur, len }) {
bench.start();
const msg = `"${'.'.repeat(len)}"`;
const options = { 'stdio': ['ignore', 'pipe', 'ignore'] };
const child = child_process.spawn('yes', [msg], options);
var bytes = 0;
child.stdout.on('data', (msg) => {
bytes += msg.length;
});
setTimeout(() => {
if (process.platform === 'win32') {
// Sometimes there's a yes.exe process left hanging around on Windows...
child_process.execSync(`taskkill /f /t /pid ${child.pid}`);
} else {
child.kill();
}
const gbits = (bytes * 8) / (1024 * 1024 * 1024);
bench.end(gbits);
}, dur * 1000);
}