Re: [RFC] APC/PHP Lazy Loading

shire wrote:

Dmitry Stogov wrote:

Hi, Personally, I like the patch except for some small possible tweaks, and I believe it can't make any harm with lazy loading disabled.

Thanks, what are the tweaks you'd like to see so I can try to include them?

I thought about different semantics for defined_function_hook and declared_class_hook to just load all "lazy" function/classes into regular ZE tables. It's also possible to pass hash_values into lookup_function_hook and lookup_class_hook to don't calculate them twice. I'll return to you in a day or two (after playing with patch and measuring speed difference) to be more concrete. Thanks. Dmitry.

Could you provide some benchmark results?

I was hoping to solicit some from others on the list, but haven't seen anything yet. My best example of gains is Facebook, I believe these where around 20-30% decrease in CPU usage on a bare-bones page. I did test Joomla and Zend Framework, the gains here aren't much if anything as they seem to be use autoload for most files. (although I would like to see what lazy method loading can do here). I intend to benchmark wordpress as well. I'll post more benchmarks for the above and this once I make some more tweaks that also might give us better results. I anticipate that benchmarks are going to vary pretty drastically depending on code structure, size, autoloading, etc.

APC patch to play with it and see advantages/disadvantages?

I've gone ahead and checked in the current code for APC, so you'll have the necessary changes if you checkout CVS HEAD. -shire