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'use strict';
const fork = require('child_process').fork;
const path = require('path');
const CLI = require('./_cli.js');
//
// Parse arguments
//
const cli = new CLI(`usage: ./node scatter.js [options] [--] <filename>
Run the benchmark script <filename> many times and output the rate (ops/s)
together with the benchmark variables as a csv.
--runs 30 number of samples
--set variable=value set benchmark variable (can be repeated)
`, { arrayArgs: ['set'] });
if (cli.items.length !== 1) {
cli.abort(cli.usage);
}
// Create queue from the benchmarks list such both node versions are tested
// `runs` amount of times each.
const filepath = path.resolve(cli.items[0]);
const name = filepath.slice(__dirname.length + 1);
const runs = cli.optional.runs ? parseInt(cli.optional.runs, 10) : 30;
let printHeader = true;
function csvEncodeValue(value) {
if (typeof value === 'number') {
return value.toString();
}
return `"${value.replace(/"/g, '""')}"`;
}
(function recursive(i) {
const child = fork(path.resolve(__dirname, filepath), cli.optional.set);
child.on('message', (data) => {
if (data.type !== 'report') {
return;
}
// print csv header
if (printHeader) {
const confHeader = Object.keys(data.conf)
.map(csvEncodeValue)
.join(', ');
console.log(`"filename", ${confHeader}, "rate", "time"`);
printHeader = false;
}
// print data row
const confData = Object.keys(data.conf)
.map((key) => csvEncodeValue(data.conf[key]))
.join(', ');
console.log(`"${name}", ${confData}, ${data.rate}, ${data.time}`);
});
child.once('close', (code) => {
if (code) {
process.exit(code);
return;
}
// If there are more benchmarks execute the next
if (i + 1 < runs) {
recursive(i + 1);
}
});
})(0);
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