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Advanced PHP Programming by George Schlossnagle

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Chapter 18. Profiling

If you program PHP professionally, there is little doubt that at some point you will need to improve the performance of an application. If you work on a high-traffic site, this might be a daily or weekly endeavor for you; if your projects are mainly intranet ones, the need may arise less frequently. At some point, though, most applications need to be retuned in order to perform as you want them to.

When I’m giving presentations on performance tuning PHP applications, I like to make the distinction between tuning tools and diagnostic techniques. Until now, this book has largely focused on tuning tools: caching methodologies, system-level tunings, database query optimization, and improved algorithm design. I like to think of ...

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