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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 https://chromium-review.googlesource.com/c/v8/v8/+/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 } ```
21 lines
718 B
JavaScript
21 lines
718 B
JavaScript
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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// Note: when benchmarking across different Deno version, make sure to clear
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// the DENO_DIR cache.
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let [total, count] = typeof Deno !== "undefined" ? Deno.args : [];
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total = total ? parseInt(total, 0) : 50;
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count = count ? parseInt(count, 10) : 1000000;
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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(i);
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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) queueMicrotask(() => bench(fun));
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}
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localStorage.clear();
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localStorage.setItem("foo", "bar");
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bench(() => localStorage.getItem("foo"));
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