Improve performance of Array.prototype.join and String.prototype.substring...

test/mjsunit/fuzz-natives.js

Index: test/mjsunit/fuzz-natives.js
===================================================================
--- test/mjsunit/fuzz-natives.js	(revision 3544)
+++ test/mjsunit/fuzz-natives.js	(working copy)
@@ -95,7 +95,11 @@
 
 var knownProblems = {
   "Abort": true,
-  
+
+  // Avoid calling the concat operation, because weird lengths
+  // may lead to out-of-memory.

[Erik Corry, 2010/01/06 14:03:57]

This is somehow unsatisfactory.

+  "StringBuilderConcat": true,
+
   // These functions use pseudo-stack-pointers and are not robust
   // to unexpected integer values.
   "DebugEvaluate": true,
@@ -114,7 +118,7 @@
   // the rest of the tests.
   "DisableAccessChecks": true,
   "EnableAccessChecks": true,
-  
+
   // These functions should not be callable as runtime functions.
   "NewContext": true,
   "NewArgumentsFast": true,