There is an updated benchmark including Opera 10.50b and Chrome 5.0 here!
A newly released pre-alpha version of Opera promises to radically improve the browser’s performance and speed of displaying and loading websites. The official developer website even claims that “[Opera 10.50] is fast, more than 7x faster in SunSpider than Opera 10.10“. Since Google Chrome has been the fastest browser on the market so far, followed by Apple’s Safari browser, we may have a new player among the best-performing browser.

I downloaded and tested Opera 10.50 and found out that it actually is much faster than before, but also very unstable. I ran Peacekeeper three times, the first time it went well, the second time it was much slower and the third time it didn’t start the benchmark and showed just a blank page. I had to re-install Opera in order to fix this problem. But please keep in mind that this is a pre-alpha release and not meant for everyday use.
In comparison to Chrome 5.0.307.1, Opera 10.50 lost by 12.8%, which is actually a big improvement compared to Chrome 2.0.170 and Opera 9.64, where Opera lost by 60.2%. Safari, once the fastest browser, scored 28.6% less than Chrome, thus giving up its second place to Opera.

Considering the fact that Opera is still pre-alpha and that the development team will improve it before releasing the final version, one can expect Opera’s Peacekeeper score to increase again, bringing it dangerously close to Chrome.