Incorporate feedback from issue 679 and issue 690

benchmarks/base.js

Index: benchmarks/base.js
===================================================================
--- benchmarks/base.js	(revision 4657)
+++ benchmarks/base.js	(working copy)
@@ -78,7 +78,7 @@
 // Scores are not comparable across versions. Bump the version if
 // you're making changes that will affect that scores, e.g. if you add
 // a new benchmark or change an existing one.
-BenchmarkSuite.version = '5';
+BenchmarkSuite.version = '6 (candidate)';
 
 
 // To make the benchmark results predictable, we replace Math.random