Performance of PHP 5.4 vs 5.3 vs 5.2


has anyone measured the performance of different versions of php? I am on 5.2 and probably will need to upgrade anyway but would like to know if there is any gain I can expect after upgrading? That would make my decision easier ;).

In general, it seems 5.4 is faster than the others. This may not be true for any particular set up of course, but I’ve seen improvements myself from 5.4 - especially in creating objects.