Current File : /home/vacivi36/vittasync.vacivitta.com.br/vittasync/node/benchmark/misc/startup-cli-version.js
'use strict';
const common = require('../common.js');
const { spawnSync } = require('child_process');
const { existsSync } = require('fs');
const path = require('path');
// This benchmarks the startup of various CLI tools that are already
// checked into the source code. We use --version because the output
// tends to be minimal and fewer operations are done to generate
// these so that the startup cost is still dominated by a more
// indispensible part of the CLI.
const bench = common.createBenchmark(main, {
cli: [
'tools/node_modules/eslint/bin/eslint.js',
'deps/npm/bin/npx-cli.js',
'deps/npm/bin/npm-cli.js',
'deps/corepack/dist/corepack.js',
],
count: [30],
});
function spawnProcess(cli, bench, state) {
const cmd = process.execPath || process.argv[0];
while (state.finished < state.count) {
const child = spawnSync(cmd, [cli, '--version'], {
env: { npm_config_loglevel: 'silent', ...process.env },
});
// Log some information for debugging if it fails, which it shouldn't.
if (child.status !== 0) {
console.log('---- STDOUT ----');
console.log(child.stdout.toString());
console.log('---- STDERR ----');
console.log(child.stderr.toString());
throw new Error(`Child process stopped with exit code ${child.status}`);
}
state.finished++;
if (state.finished === 0) {
// Finished warmup.
bench.start();
}
if (state.finished === state.count) {
bench.end(state.count);
}
}
}
function main({ count, cli }) {
cli = path.resolve(__dirname, '../../', cli);
if (!existsSync(cli)) {
return;
}
const warmup = 3;
const state = { count, finished: -warmup };
spawnProcess(cli, bench, state);
}
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