On Thu, February 7, 2008 8:35 pm, Andrés Robinet wrote: > 1 - I believe the fact that we don't "encode" (read "compile") our > scripts is > tightly related to the fact that we don't have a bytecode interpreter > (say JIT > compiler or something?) bundled into PHP.
Errrrr. PHP has a bytecode interpreter in the Zend Engine... That's kinda what it *does* It's not a JIT, however, at this time, though there's always talk on internals@ about making it more and more JIT-like. The various caching mechanisms (Zend Cache Accelerator, APC, etc) all store the bytecode version of the PHP script, not the original source. This provides a TINY performance benefit, which is completely dwarfed by not hitting the hard disk to read the PHP script, and costs almost nothing since it's basically the difference between this psuedo C code: . . . script = fread(fp, 1000000000); cache(script); bytecode = parse(script); . . . and this: . . . script = fread(fp, 1000000000); bytecode = parse(script); cache(bytecode); . . . You can rely on the bytecode interpreter being there, as that's what the Zend Engine *is*. This does not necessarily make your other points invalid -- but they cannot be based around the [incorrect] facts you stated. :-) -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
