buffer: default to UTF8 in byteLength()

If an undefined encoding is passed to byteLength(), assume that it is UTF8 immediately. This yields a small speedup, as it prevents string operations on the encoding argument. PR-URL: #4010 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Trevor Norris <[email protected]>
nodejs · Jan 19, 2016 · a320045 · a320045
1 parent bb158f8
commit a320045
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/buffer.js b/lib/buffer.js
@@ -276,6 +276,7 @@ function byteLength(string, encoding) {
 
       case 'utf8':
       case 'utf-8':
+      case undefined:
         return binding.byteLengthUtf8(string);
 
       case 'ucs2':