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67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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// Run with: deno run -A ./cli/bench/deno_common.js
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function benchSync(name, n, innerLoop) {
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const t1 = Date.now();
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for (let i = 0; i < n; i++) {
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innerLoop(i);
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}
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const t2 = Date.now();
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const dt = (t2 - t1) / 1e3;
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const r = n / dt;
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const ns = Math.floor(dt / n * 1e9);
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console.log(
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`${name}:${" ".repeat(20 - name.length)}\t` +
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`n = ${n}, dt = ${dt.toFixed(3)}s, r = ${r.toFixed(0)}/s, t = ${ns}ns/op`,
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);
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}
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function benchUrlParse() {
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benchSync("url_parse", 5e4, (i) => {
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new URL(`http://www.google.com/${i}`);
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});
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}
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function benchDateNow() {
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benchSync("date_now", 5e5, () => {
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Date.now();
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});
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}
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function benchPerfNow() {
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benchSync("perf_now", 5e5, () => {
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performance.now();
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});
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}
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function benchWriteNull() {
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// Not too large since we want to measure op-overhead not sys IO
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const dataChunk = new Uint8Array(100);
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const file = Deno.openSync("/dev/null", { write: true });
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benchSync("write_null", 5e5, () => {
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Deno.writeSync(file.rid, dataChunk);
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});
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Deno.close(file.rid);
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}
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function benchReadZero() {
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const buf = new Uint8Array(100);
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const file = Deno.openSync("/dev/zero");
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benchSync("read_zero", 5e5, () => {
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Deno.readSync(file.rid, buf);
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});
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Deno.close(file.rid);
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}
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function main() {
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// v8 builtin that's close to the upper bound non-NOPs
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benchDateNow();
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// A very lightweight op, that should be highly optimizable
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benchPerfNow();
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// A common "language feature", that should be fast
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// also a decent representation of a non-trivial JSON-op
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benchUrlParse();
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// IO ops
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benchReadZero();
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benchWriteNull();
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}
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main();
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