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add measuring of the rewrite() function

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Toshit Chawda 2024-10-21 23:10:49 -07:00
parent 66929af43c
commit cd8495b7ae
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GPG key ID: 91480ED99E2B3D9D
4 changed files with 76 additions and 38 deletions
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65
src/shared/rewriters/js.ts
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@ -6,6 +6,7 @@ import {
initSync,
rewrite_js,
rewrite_js_from_arraybuffer,
RewriterOutput,
} from "../../../rewriter/out/rewriter.js";
import { $scramjet, flagEnabled } from "../../scramjet";
@ -19,13 +20,51 @@ init();
Error.stackTraceLimit = 50;
function print_errors(errors: string[]) {
const decoder = new TextDecoder();
function rewriteJsWrapper(
input: string | ArrayBuffer,
meta: URLMeta
): string | ArrayBuffer {
let out: RewriterOutput;
if (typeof input === "string") {
out = rewrite_js(
input,
meta.base.href,
"PERCS_PLEASE_FILL_THIS_IN.js",
$scramjet
);
} else {
out = rewrite_js_from_arraybuffer(
new Uint8Array(input),
meta.base.href,
"PERCS_PLEASE_FILL_THIS_IN.js",
$scramjet
);
}
const { js, errors, duration } = out;
// TODO: maybe make this a scram flag?
if (true) {
for (const error of errors) {
console.error("oxc parse error", error);
}
}
// TODO: maybe make this a scram flag?
if (true) {
let timespan: string;
if (duration < 1n) {
timespan = "BLAZINGLY FAST";
} else if (duration < 500n) {
timespan = "decent speed";
} else {
timespan = "really slow";
}
console.log(`oxc rewrite was ${timespan} (${duration}ms)`);
}
return typeof input === "string" ? decoder.decode(js) : js;
}
export function rewriteJs(js: string | ArrayBuffer, meta: URLMeta) {
@ -37,29 +76,7 @@ export function rewriteJs(js: string | ArrayBuffer, meta: URLMeta) {
return rewriteJsNaiive(text);
}
// const before = performance.now();
if (typeof js === "string") {
let { js: js_out, errors } = rewrite_js(
js,
meta.base.href,
"PERCS_PLEASE_FILL_THIS_IN.js",
$scramjet
);
js = new TextDecoder().decode(js_out);
print_errors(errors);
} else {
let { js: js_out, errors } = rewrite_js_from_arraybuffer(
new Uint8Array(js),
meta.base.href,
"PERCS_PLEASE_FILL_THIS_IN.js",
$scramjet
);
js = js_out;
print_errors(errors);
}
// const after = performance.now();
// dbg.debug("Rewrite took", Math.floor((after - before) * 10) / 10, "ms");
js = rewriteJsWrapper(js, meta);
return js;
}