MIRROR: javascript for 🐜's, a tiny runtime with big ambitions
add in-depth microbench2
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examples/demo/microbench2.js
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examples/demo/microbench2.js
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function add(a, b) {
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return a + b;
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}
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function now() {
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if (typeof performance === 'object' && performance && typeof performance.now === 'function') {
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return performance.now();
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}
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return Date.now();
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}
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function benchEmpty(iterations) {
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let result = 0;
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for (let i = 0; i < iterations; i++) {
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result = i;
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}
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return result;
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}
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function benchInline(iterations) {
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let result = 0;
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for (let i = 0; i < iterations; i++) {
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result += i + (i + 1);
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}
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return result;
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}
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function benchCall(iterations) {
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let result = 0;
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for (let i = 0; i < iterations; i++) {
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result += add(i, i + 1);
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}
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return result;
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}
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function time(name, iterations, fn) {
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let start = now();
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let result = fn(iterations);
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let elapsed = now() - start;
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console.log(`${name}: ${elapsed.toFixed(3)}ms (result: ${result})`);
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}
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const iterations = Number(process.argv[2] || 2000000);
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const warmupIterations = Math.min(iterations, 200000);
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console.log(`Running ${iterations} iterations...`);
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time('cold call add', iterations, benchCall);
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benchEmpty(warmupIterations);
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benchInline(warmupIterations);
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benchCall(warmupIterations);
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time('warm empty loop', iterations, benchEmpty);
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time('warm inline add', iterations, benchInline);
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time('warm call add', iterations, benchCall);
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console.log('Done!');