By many accounts, Opera 10.5 (currently pre-alpha) provides excellent Javascript performance competition and is faster than Chrome in many performance benchmarks including Sunspider and Peacekeeper, and has excellent competition in V8 benchmark.
http://www.google.com/search?q=opera+10.5+javascript -- v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev
