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https://github.com/denoland/deno.git
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396498bf9e
This PR optimizes `Request` constructor when `init` is not empty. This
path is also used by `fetch` when `options` argument is used
```js
fetch("https://deno.land", {
method: "POST",
body: 'land'
});
```
- Removed 3 extra calls to `headerListFromHeaders`
- Avoid `Object.keys` & `headerList` clone if `init.headers` is set
- Only empty `headersList` (`.splice`) if it's not already empty.
## Benchmarks
**this patch**
```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.1 (x86_64-unknown-linux-gnu)
benchmark time (avg) iter/s (min … max) p75 p99 p995
----------------------------------------------------------------------------- -----------------------------
Request without headers 1.86 µs/iter 536,440.7 (1.67 µs … 2.76 µs) 1.89 µs 2.76 µs 2.76 µs
Request with headers 1.96 µs/iter 509,440.5 (1.83 µs … 2.17 µs) 1.99 µs 2.17 µs 2.17 µs
```
**main**
```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.1 (x86_64-unknown-linux-gnu)
benchmark time (avg) iter/s (min … max) p75 p99 p995
----------------------------------------------------------------------------- -----------------------------
Request without headers 1.96 µs/iter 510,201.5 (1.81 µs … 2.64 µs) 2 µs 2.64 µs 2.64 µs
Request with headers 2.03 µs/iter 493,526.6 (1.84 µs … 2.31 µs) 2.08 µs 2.31 µs 2.31 µs
```
```js
Deno.bench("Request without headers", () => {
const r = new Request("https://deno.land", {
method: "POST",
body: '{"foo": "bar"}',
});
});
Deno.bench("Request with headers", () => {
const r = new Request("https://deno.land", {
method: "POST",
body: '{"foo": "bar"}',
headers: {
"Content-Type": "application/json",
},
});
});
```
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|---|---|---|
| .. | ||
| broadcast_channel | ||
| cache | ||
| console | ||
| crypto | ||
| fetch | ||
| ffi | ||
| fs | ||
| http | ||
| io | ||
| kv | ||
| napi | ||
| net | ||
| node | ||
| tls | ||
| url | ||
| web | ||
| webidl | ||
| websocket | ||
| webstorage | ||