Firefox 3 Beta 5 is here, and reviewed
Firefox 3 Beta 5, Gran Paradiso’s milestone #13 is here and the list of features and improvement it brings along is pretty long so let’s get started.
Performance
Firefox 3 gets several performance improvement gains. Among them, profile guided optimizations (PGO) provides an optimized Firefox build based on the way it internally works. So far it is only available for Windows. Linux should follow shortly and Mac OS X could also make it before final release.
A very noticeable gain can be seen in JavaScript: it is about three times faster than Firefox 2 implementation. JavaScript is twice as important for Firefox since it is not only used in a large number of web pages but it’s also what makes Firefox UI work.
Memory wise, a much needed memory cycle collector is now in place to take care of freeing memory no longer used by modules that requested it but failed to release it properly.
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