From 77ba0019e73710e1e685a8051b9cca79cc6e5054 Mon Sep 17 00:00:00 2001
From: David Sherret <dsherret@users.noreply.github.com>
Date: Wed, 26 Jun 2024 16:23:09 -0400
Subject: Revert "perf: improve Buffer.from(buf) by 29x" (#24351)

https://github.com/denoland/deno/pull/24341#discussion_r1655247367

Reverts denoland/deno#24341
---
 ext/node/polyfills/internal/buffer.mjs | 11 -----------
 1 file changed, 11 deletions(-)

(limited to 'ext/node/polyfills/internal/buffer.mjs')

diff --git a/ext/node/polyfills/internal/buffer.mjs b/ext/node/polyfills/internal/buffer.mjs
index de3568a83..a051965a3 100644
--- a/ext/node/polyfills/internal/buffer.mjs
+++ b/ext/node/polyfills/internal/buffer.mjs
@@ -229,22 +229,11 @@ 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);
   }
 
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