perf: improve Buffer.from(buf) by 29x (#24341)

denoland · Jun 26, 2024 · 6da8745 · 6da8745
1 parent eb283c4
commit 6da8745
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/ext/node/polyfills/internal/buffer.mjs b/ext/node/polyfills/internal/buffer.mjs
@@ -229,11 229,22 @@ function fromArrayLike(array) {
  return buf;
 }
 
 function fromUint8Array(u8) {
  const buf = new Uint8Array(u8.buffer, u8.byteOffset, u8.byteLength);
  Object.setPrototypeOf(buf, Buffer.prototype);
  return buf.slice();
 }
 
 function fromObject(obj) {
  if (obj.length !== undefined || isAnyArrayBuffer(obj.buffer)) {
  if (typeof obj.length !== "number") {
  return createBuffer(0);
  }
 
  if (obj instanceof Uint8Array) {
  return fromUint8Array(obj);
  }
 
  return fromArrayLike(obj);
  }