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'use strict';
const common = require('../common.js');
const { exec, execSync } = require('child_process');
const isWindows = process.platform === 'win32';
const messagesLength = [64, 256, 1024, 4096];
// Windows does not support command lines longer than 8191 characters
if (!isWindows) messagesLength.push(32768);
const bench = common.createBenchmark(childProcessExecStdout, {
len: messagesLength,
dur: [5]
});
function childProcessExecStdout({ dur, len }) {
bench.start();
const maxDuration = dur * 1000;
const cmd = `yes "${'.'.repeat(len)}"`;
const child = exec(cmd, { 'stdio': ['ignore', 'pipe', 'ignore'] });
var bytes = 0;
child.stdout.on('data', (msg) => {
bytes += msg.length;
});
setTimeout(() => {
bench.end(bytes);
if (isWindows) {
// Sometimes there's a yes.exe process left hanging around on Windows.
try {
execSync(`taskkill /f /t /pid ${child.pid}`);
} catch {
// This is a best effort kill. stderr is piped to parent for tracing.
}
} else {
child.kill();
}
}, maxDuration);
}
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