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import { bench, group, run } from "mitata";
import { readFileSync } from "fs";
import { allocUnsafe } from "bun";
function polyfill(chunks) {
var size = 0;
for (const chunk of chunks) {
size += chunk.byteLength;
}
var buffer = new ArrayBuffer(size);
var view = new Uint8Array(buffer);
var offset = 0;
for (const chunk of chunks) {
view.set(chunk, offset);
offset += chunk.byteLength;
}
return buffer;
}
function polyfillUninitialized(chunks) {
var size = 0;
for (const chunk of chunks) {
size += chunk.byteLength;
}
var view = allocUnsafe(size);
var offset = 0;
for (const chunk of chunks) {
view.set(chunk, offset);
offset += chunk.byteLength;
}
return view.buffer;
}
const chunkGroups = [
[Uint8Array.from([123]), Uint8Array.from([456]), Uint8Array.from([789])],
Array.from(readFileSync(import.meta.path)).map((a) => Uint8Array.from([a])),
[readFileSync(import.meta.path)],
Array.from({ length: 42 }, () => readFileSync(import.meta.path)),
Array.from({ length: 2 }, () =>
new TextEncoder().encode(readFileSync(import.meta.path, "utf8").repeat(100))
),
];
for (const chunks of chunkGroups) {
group(
`${chunks.reduce(
(prev, curr, i, a) => prev + curr.byteLength,
0
)} bytes for ${chunks.length} chunks`,
() => {
bench("Bun.concatArrayBuffers", () => {
Bun.concatArrayBuffers(chunks);
});
bench("Uint8Array.set", () => {
polyfill(chunks);
});
bench("Uint8Array.set (uninitialized memory)", () => {
polyfillUninitialized(chunks);
});
}
);
}
await run();
|
