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4960b6659c
This PR optimizes `ReadableStream` async iterator
### Benchmarks
```js
Deno.bench("Stream - iterator", async () => {
const stream = new ReadableStream({
start(controller) {
controller.enqueue(new Uint8Array([97]));
controller.enqueue(new Uint8Array([97]));
controller.close();
},
});
for await (const chunk of stream) {}
});
```
**main**
`2 chunks`
```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.4 (x86_64-unknown-linux-gnu)
benchmark time (avg) iter/s (min … max) p75 p99 p995
----------------------------------------------------------------------- -----------------------------
Stream - iterator 12.45 µs/iter 80,295.5 (10.5 µs … 281.12 µs) 12.13 µs 26.71 µs 33.63 µs
```
`20 chunks`
```
benchmark time (avg) iter/s (min … max) p75 p99 p995
----------------------------------------------------------------------- -----------------------------
Stream - iterator 32.99 µs/iter 30,312.2 (28.13 µs … 1.21 ms) 31.8 µs 81.82 µs 179.93 µs
```
---
**this PR**
`2 chunks`
```
cpu: 13th Gen Intel(R) Core(TM) i9-13900H
runtime: deno 1.36.4 (x86_64-unknown-linux-gnu)
benchmark time (avg) iter/s (min … max) p75 p99 p995
----------------------------------------------------------------------- -----------------------------
Stream - iterator 9.37 µs/iter 106,700.8 (8.35 µs … 730.71 µs) 9.15 µs 13.12 µs 18.17 µs
```
`20 chunks`
```
benchmark time (avg) iter/s (min … max) p75 p99 p995
----------------------------------------------------------------------- -----------------------------
Stream - iterator 16.59 µs/iter 60,270.0 (12.08 µs … 1.37 ms) 15.06 µs 83.03 µs 123.52 µs
```
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|---|---|---|
| .. | ||
| benches | ||
| 00_infra.js | ||
| 01_dom_exception.js | ||
| 01_mimesniff.js | ||
| 02_event.js | ||
| 02_structured_clone.js | ||
| 02_timers.js | ||
| 03_abort_signal.js | ||
| 04_global_interfaces.js | ||
| 05_base64.js | ||
| 06_streams.js | ||
| 06_streams_types.d.ts | ||
| 08_text_encoding.js | ||
| 09_file.js | ||
| 10_filereader.js | ||
| 12_location.js | ||
| 13_message_port.js | ||
| 14_compression.js | ||
| 15_performance.js | ||
| blob.rs | ||
| Cargo.toml | ||
| compression.rs | ||
| hr_timer_lock.rs | ||
| internal.d.ts | ||
| lib.deno_web.d.ts | ||
| lib.rs | ||
| message_port.rs | ||
| README.md | ||
| stream_resource.rs | ||
| timers.rs | ||
deno web
Op crate that implements Event, TextEncoder, TextDecoder and File API (https://w3c.github.io/FileAPI).
Testing for text encoding is done via WPT in cli/.