buffer: improve Buffer.byteLength(string, encoding)

When string is empty, it will running into binding also. It make the performance is wasted.
nodejs · Apr 16, 2015 · 7c00ec2 · 7c00ec2
1 parent 10e31ba
commit 7c00ec2
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/buffer.js b/lib/buffer.js
@@ -276,6 +276,9 @@ function byteLength(string, encoding) {
   if (typeof(string) !== 'string')
     string = String(string);
 
+  if (string.length === 0)
+    return 0;
+
   switch (encoding) {
     case 'ascii':
     case 'binary':