fork.js

function log(message) {
    console.log(`[${process.pid}][${Date.now()}] ${message}`);
}

if (process.argv[2] === 'child') {
    log("child");
} else {
    const { fork } = require('node:child_process');
    const controller = new AbortController();
    log("forking");
    let before_fork = Date.now();
    const child = fork(__filename, ['child']);
    log(`child PID: ${child.pid}`);
    child.on('exit', (_, _) => {
        let child_exited = Date.now();
        log("child exited");
        let took = (child_exited - before_fork) / 1000;
        log(`took ${took}s`);
        process.exit();
    });
}