Changed the RegExp benchmark to exercise the regexp engine on different ...

benchmarks/README.txt

 V8 Benchmark Suite
 ==================
 
 This is the V8 benchmark suite: A collection of pure JavaScript
 benchmarks that we have used to tune V8. The licenses for the
 individual benchmarks are included in the JavaScript files.
 
 In addition to the benchmarks, the suite consists of the benchmark
 framework (base.js), which must be loaded before any of the individual
 benchmark files, and two benchmark runners: An HTML version (run.html)
@@ skipping 52 matching lines @@
 extensions enabled.
 
 
 Changes from Version 5 to Version 6
 ===================================
 
 Removed dead code from the RayTrace benchmark and fixed a couple of
 typos in the DeltaBlue implementation. Changed the Splay benchmark to
 avoid converting the same numeric key to a string over and over again
 and to avoid inserting and removing the same element repeatedly thus
-increasing pressure on the memory subsystem.
+increasing pressure on the memory subsystem. Changed the RegExp
+benchmark to exercise the regular expression engine on different
+input strings.
 
 Furthermore, the benchmark runner was changed to run the benchmarks
 for at least a few times to stabilize the reported numbers on slower
 machines.