> Does anyone know how the PHP Interpreter pulls switch/case statements > together? Does it emulate a C compiler and, for larger case sets, > build a huge if/else cascade? Does it do this always? Is there any way
Since PHP isn't really compiled, there are some inefficiencies when compared with something like C. I don't remember the exact mechanics, but switch is generally slower than if/else and less optimizable (word?) when it comes to opcode caching/etc.. > to know when it builds a jump table (like a s/c is supposed to)? I've > got a slow script (it's eating ~85% of execution time) that I can't > work around and one of the slower parts is a switch case (which is > slightly faster than manually building an if/else cascade) and was > wondering if anyone had any performance tips for cases like these. How many cases do you have? Could you refactor into a loop? Are you doing string comparisons, or can they be converted to numeric tests? Could some of the logic be reduced/spread out into a database or some other process? H _______________________________________________ New York PHP User Group Community Talk Mailing List http://lists.nyphp.org/mailman/listinfo/talk http://www.nyphp.org/show_participation.php
