Revision: 24334
Author: yang...@chromium.org
Date: Tue Sep 30 15:07:21 2014 UTC
Log: Add a fast case for one-element arrays in ArrayJoin
This case handles all one-element arrays that were not handled by
_FastOneByteArrayJoin
BUG=
R=yang...@chromium.org
Review URL: https://codereview.chromium.org/607503004
Patch from Fadi Meawad <fmea...@chromium.org>.
https://code.google.com/p/v8/source/detail?r=24334
Modified:
/branches/bleeding_edge/src/array.js
=======================================
--- /branches/bleeding_edge/src/array.js Wed Sep 17 14:01:25 2014 UTC
+++ /branches/bleeding_edge/src/array.js Tue Sep 30 15:07:21 2014 UTC
@@ -377,6 +377,14 @@
var result = %_FastOneByteArrayJoin(array, separator);
if (!IS_UNDEFINED(result)) return result;
+
+ // Fast case for one-element arrays.
+ if (length === 1) {
+ var e = array[0];
+ if (IS_STRING(e)) return e;
+ if (IS_NULL_OR_UNDEFINED(e)) return '';
+ return NonStringToString(e);
+ }
return Join(array, length, separator, ConvertToString);
}
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