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https://github.com/denoland/deno.git
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9b2b8df927
Uses SeqOneByteString optimization to do zero-copy `&str` arguments in
fast calls.
- [x] Depends on https://github.com/denoland/rusty_v8/pull/1129
- [x] Depends on
4036884
- [x] Disable in async ops
- [x] Make it work with owned `String` with an extra alloc in fast path.
- [x] Support `Cow<'_, str>`. Owned for slow case, Borrowed for fast
case
```rust
#[op]
fn op_string_len(s: &str) -> u32 {
str.len() as u32
}
```
22 lines
672 B
JavaScript
22 lines
672 B
JavaScript
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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let [total, count] = typeof Deno !== "undefined"
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? Deno.args
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: [process.argv[2], process.argv[3]];
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total = total ? parseInt(total, 0) : 50;
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count = count ? parseInt(count, 10) : 10000000;
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function bench(fun) {
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const start = Date.now();
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for (let i = 0; i < count; i++) fun();
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const elapsed = Date.now() - start;
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const rate = Math.floor(count / (elapsed / 1000));
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console.log(`time ${elapsed} ms rate ${rate}`);
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if (--total) bench(fun);
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}
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const encoder = new TextEncoder();
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const data = "hello world";
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const out = new Uint8Array(100);
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bench(() => encoder.encodeInto(data, out));
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