Some benchmarks are more suitable than others to provide you with those information as they take into account newer technologies and improvements that older benchmarks might not. Octane extends the V8 benchmark suite with five additional benchmarks that do away with artificial tests and run benchmarks using known web applications and libraries.
Each benchmark tests certain features, like math operations, core language features or strings and arrays to come up with a performance score for each individual item and a geometric mean of the single scores that you can compare with other browsers.
I have run the benchmark on the following browsers and this are the results. The first three results are from a PC running Windows 7, the three remaining results from a different desktop PC running Windows 8.
You can read Google's announcement over at the official Chromium Blog. The post reveals information about the five tests that have been added in this release.
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