Following our Google Chrome (32 bit vs. 64 bit), Internet Explorer 9 (32 bit vs. 64 bit) and Firefox (32 bit vs. 64 bit) posts, here is another one: a comparison of last week’s Opera 12 Lab builds.

Testing notes: both builds have identical build numbers and were tested with default installation settings.





What started as optimistic first run with SunsSpider has left us confused. As in all but one benchmark, the 64 bit version of Opera 12 web browser scored less than its 32 bit sister.

We are not exactly sure why this has turned out the way it did, considering that every other web browser offered significant improvements when running a 64 bit flavor.