Re: About optimization

Sebastian Bergmann wrote:

Am 13.01.2010 12:18, schrieb mathieu.suen:

I would like to know why the opcode is not optimized.

Because any optimization, even very simple ones, impose a performance penalty in the default execution model of PHP which does not use a bytecode cache.

For simple optimization I don't think so. Take the simple example: function foo() { $a = 45; return $a; } Here if you don't optimize you are creating a variable. So you put pressure on the gc and the memory. Best would be some benchmark. By the way why there is no native bytecode cache ?

Only when the bytecode is not regenerated for each execution does it make sense to invest for time for the then one-time compilation.

Sorry I don't understand what do you mean? -- Mathieu Suen