microbench2.js
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microbench2.js
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	function add(a, b) {
	return a + b;
	}

	function now() {
	if (typeof performance === 'object' && performance && typeof performance.now === 'function') {
	return performance.now();
	}
	return Date.now();
	}

	function benchEmpty(iterations) {
	let result = 0;
	for (let i = 0; i < iterations; i++) {
	result = i;
	}
	return result;
	}

	function benchInline(iterations) {
	let result = 0;
	for (let i = 0; i < iterations; i++) {
	result += i + (i + 1);
	}
	return result;
	}

	function benchCall(iterations) {
	let result = 0;
	for (let i = 0; i < iterations; i++) {
	result += add(i, i + 1);
	}
	return result;
	}

	function time(name, iterations, fn) {
	let start = now();
	let result = fn(iterations);
	let elapsed = now() - start;
	console.log(`${name}: ${elapsed.toFixed(3)}ms (result: ${result})`);
	}

	const iterations = Number(process.argv[2] \|\| 2000000);
	const warmupIterations = Math.min(iterations, 200000);

	console.log(`Running ${iterations} iterations...`);

	time('cold call add', iterations, benchCall);

	benchEmpty(warmupIterations);
	benchInline(warmupIterations);
	benchCall(warmupIterations);

	time('warm empty loop', iterations, benchEmpty);
	time('warm inline add', iterations, benchInline);
	time('warm call add', iterations, benchCall);
	console.log('Done!');