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denoland-deno/cli/bench/async_ops_deferred.js
Matt Mastracci bb1f5e4262
perf(core): async op pseudo-codegen and performance work (#18887)
Performance:

```
async_ops.js: 760k -> 1030k (!)
async_ops_deferred.js: 730k -> 770k
Deno.serve bench: 118k -> 124k
WS test w/ third_party/prebuilt/mac/load_test 100 localhost 8000 0 0: unchanged

Startup time: approx 0.5ms slower (13.7 -> 14.2ms)
```
2023-04-30 08:50:24 +00:00

22 lines
787 B
JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
const queueMicrotask = globalThis.queueMicrotask || process.nextTick;
let [total, count] = typeof Deno !== "undefined"
? Deno.args
: [process.argv[2], process.argv[3]];
total = total ? parseInt(total, 0) : 50;
count = count ? parseInt(count, 10) : 1000000;
async function bench(fun) {
const start = Date.now();
for (let i = 0; i < count; i++) await fun();
const elapsed = Date.now() - start;
const rate = Math.floor(count / (elapsed / 1000));
console.log(`time ${elapsed} ms rate ${rate}`);
if (--total) queueMicrotask(() => bench(fun));
}
const core = Deno[Deno.internal].core;
const ops = core.ops;
const opVoidAsyncDeferred = ops.op_void_async_deferred;
bench(() => opVoidAsyncDeferred());