The BIG browser benchmark: All the latest browsers tested
Summary: The BIG browser benchmark -- where the leading browsers are pitted against five of the toughest benchmark tests -- which browser will be triumphant?
Peacekeeper Benchmark
A browser benchmark tool from Futuremark, the makers of benchmarking tools such as 3DMark and PCMark. The test covers a lot more than just the JavaScript engine, and gives a good overall view of how fast a particular browser is from the front-facing end.

Google Chrome 23 is once again comfortably ahead of the competition, with Opera 12 coming in a distance second place -- Opera's best score to date in this series of tests.
Kraken Benchmark
This is Mozilla's JavaScript benchmark tool. A very demanding test that, like SunSpider, focuses on creating realistic browser workloads.

A close fight between Firefox 16 and Chrome 23, but Firefox 16 manages to take the lead. Internet Explorer 10 holds third place, but Microsoft has a lot of work to do if it is to have a chance of beating Mozilla or Google.
RoboHornet Benchmark
This is the new kid on the browser benchmark block. It is Google's vision of a modular, independent, and open-source benchmark comprising of tests created and voted on by developers and designers, with consultation from standards bodies and vendors.
RoboHornet is currently in alpha testing, so it is very much a work in progress and as such the results should be taken with at least a small pinch of salt. That said, it is a test worth keeping an eye on, and is another metric by which to test modern browsers.

Interestingly, it is Apple's Safari 5 that comes first in these test, which is curious given that Apple hasn't updated it in months and has not made Safari 6 available to Windows users. Second and third place spots go to the two most recent versions of Internet Explorer, version 10 and 9, with Chrome 23 in fourth place.
Conclusion
So, with all that, which browser is best?
To be perfectly honest, it's hard to draw any firm conclusions from the data given that there's no overall winner. Chrome 23 grabs the top spot in two of the tests, with the other three going to Internet Explorer 10, Firefox 16, and Safari 5, making statistically the latest version of Google Chrome the overall winner.
That said, the score that Microsoft's Internet Explorer 10 achieves in the SunSpider benchmark is impressive, and it pulls in a respectable score in the other four tests, so it's clear that Microsoft has done a lot of work to make its browser a lot better.
Mozilla's Firefox 16 is also no slouch, also pulling in respectable scores in most of the tests.
I've said it before, but it's worth saying again: I don't think that JavaScript performance is an issue any more, and certainly when it comes to real world testing it's hard to see a difference between any of the browsers (certain HTML5 sites notwithstanding, given that some are heavily optimized for a particular browser). In fact, unless one of the players managed to boost JavaScript performance by an order of magnitude, shaving a few milliseconds off here and there hardly matters any more.
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Talkback
Memory usage more important
Thus, I find it bloated. Combine that with the fact that it is spyware, and Chrome is a nonstarter.
What?
Just did a test
Now open 5 more tabs
20 MB more RAM?
facts!
it does take more memory
The main reason I go for chrome over FF is that for some reason FF seems to have jerky scrolling compared to chrome which irritates me.
Windows seems to be a problem too
That's interesting because ...
When comparing comparable hardware, Windows 7/8 give OSX a run for their money. Further, I'd argue that many more Windows apps have been written to take advantage of multiple threads: I see FAR more OSX apps choke while they consume a single thread that Windows apps do.
Correction
Not OSX, not Linux
It is interesting...
It would be interesting to see an Linux box (not running under a VM).
The BIG browser benchmark: All the latest browsers tested
Mozilla Firefox and IE
http://thenextweb.com/insider/2012/10/27/mozilla-sends-the-ie-team-a-cake-proving-that/
One sentence says it all
Exactly. While it might be tempting to jerk off to these benchmark numbers (nya nya my browser gets a bigger number on a benchmark than yours does) in the end, real world performance is all that counts.
This certainly puts Chris Pirillo's assault on Surface RT by jerking off to Peacekeeper numbers on a screen in perspective. "Everyone should buy the iPad because it has numbers that are bigger on a spec sheet." Thanks Adrian, you've just proved why such advice is so bad and even dishonest.
MS is clearly just optimizing
On my 8 core fedora system, I get 164ms sunspider on chrome but actually using it doesn't seem any faster than anything else.
On sunspider
Does any software
Games might use 4 cores.
Yes but it is more complicated than that.
But the real issue are the number of processes running in parallel. For example, anti-virus, everytime you open a file it will get scanned. That scan could be run on a separate core. If you are listening to music while browsing, another process. In Chrome everytime you open another tab that starts another process, which during load will want to execute in parallel to whatever else you are doing.
I tested all of them and I can't see any difference at all.