mirror of
https://github.com/denoland/deno.git
synced 2024-12-22 23:34:47 -05:00
b3ceafaa5d
Enable deno devs to bench/profile/test JS code changes without doing a full --release rebuild. Incremental release builds take ~4mn on M1s, often more on other machines ...
33 lines
794 B
Markdown
33 lines
794 B
Markdown
## Re-bootstrapping
|
|
|
|
Re-bootstrapping allows deno devs to bench/profile/test JS-side changes without
|
|
doing a full `cargo build --release --bin deno` which takes roughly ~4mn on M1s
|
|
more on other machines which significantly slows down iteration &
|
|
experimentation.
|
|
|
|
## Example
|
|
|
|
```js
|
|
import { benchSync, rebootstrap } from "./tools/bench/mod.js";
|
|
|
|
const bootstrap = rebootstrap([
|
|
"webidl",
|
|
"console",
|
|
"url",
|
|
"web",
|
|
"fetch",
|
|
]);
|
|
|
|
benchSync("resp_w_h", 1e6, () =>
|
|
new bootstrap.fetch.Response("yolo", {
|
|
status: 200,
|
|
headers: {
|
|
server: "deno",
|
|
"content-type": "text/plain",
|
|
},
|
|
}));
|
|
```
|
|
|
|
This code can then benched and profiled (using Chrome's DevTools) similar to
|
|
regular userland code and the original source files appear in the DevTools as
|
|
you would expect.
|