buffer: improve equals() performance

PR-URL: https://github.com/nodejs/node/pull/29199
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/buffer.js b/lib/buffer.js
index 7b656496e5..7f33bcab5e 100644
--- a/lib/buffer.js
+++ b/lib/buffer.js
@@ -716,10 +716,14 @@ Buffer.prototype.equals = function equals(otherBuffer) {
     throw new ERR_INVALID_ARG_TYPE(
       'otherBuffer', ['Buffer', 'Uint8Array'], otherBuffer);
   }
+
   if (this === otherBuffer)
     return true;
 
-  return _compare(this, otherBuffer) === 0;
+  if (this.byteLength !== otherBuffer.byteLength)
+    return false;
+
+  return this.byteLength === 0 || _compare(this, otherBuffer) === 0;
 };
 
 let INSPECT_MAX_BYTES = 50;