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: nodejs#4010 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Trevor Norris <trev.norris@gmail.com>
scovetta · Apr 2, 2016 · 38cb40e · 38cb40e
1 parent 582802f
commit 38cb40e
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/buffer.js b/lib/buffer.js
@@ -272,6 +272,7 @@ function byteLength(string, encoding) {
 
       case 'utf8':
       case 'utf-8':
+      case undefined:
         return binding.byteLengthUtf8(string);
 
       case 'ucs2':