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I've been seeing a lot of articles popping up lately about PHP Optimizations, particular within the code (rather than the configuration, server, caching, etc) that I have some nitpicks with. Unless your code is running incredibly slow, you've found every single bug you can possibly find without having nightmares about unit tests, or an optimization makes more than a 10% improvement in speed (factoring in your margin of error,) don't bother.