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denoland-deno/cli/bench/async_ops.js
Divy Srivastava 02187966c1
perf(core): generate inlined wrappers for async ops (#16428)
V8's JIT can do a better job knowing the argument count and also enable
fast call path (in future).

This also lets us call async ops without `opAsync`:

```js
const { ops } = Deno.core;
await ops.op_void_async();
```

this patch: 4405286 ops/sec
main: 3508771 ops/sec
2022-10-27 19:10:48 +05:30

20 lines
695 B
JavaScript

// Copyright 2018-2022 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 { ops } = Deno.core;
bench(() => ops.op_void_async());