A new browser benchmark focused on real world workloads.
"We believe that the benchmarks used in Kraken are better in terms of reflecting realistic workloads for pushing the edge of browser performance forward," Mozilla's Rob Sayre said in the Kraken announcement.
Kraken is free and open source and is continually going through tweaks and changes in an effort to evolve the benchmark quickly. Sayre says that Firefox 4 is roughly 2.5 times faster than 3.6 under the Kraken benchmark. Try the Kraken test for yourself here.