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34 lines
794 B
Markdown
34 lines
794 B
Markdown
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## Re-bootstrapping
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Re-bootstrapping allows deno devs to bench/profile/test JS-side changes without
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doing a full `cargo build --release --bin deno` which takes roughly ~4mn on M1s
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more on other machines which significantly slows down iteration &
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experimentation.
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## Example
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```js
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import { benchSync, rebootstrap } from "./tools/bench/mod.js";
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const bootstrap = rebootstrap([
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"webidl",
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"console",
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"url",
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"web",
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"fetch",
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]);
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benchSync("resp_w_h", 1e6, () =>
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new bootstrap.fetch.Response("yolo", {
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status: 200,
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headers: {
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server: "deno",
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"content-type": "text/plain",
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},
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}));
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```
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This code can then benched and profiled (using Chrome's DevTools) similar to
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regular userland code and the original source files appear in the DevTools as
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you would expect.
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