On 19/03/2021 14:45, Nikita Popov wrote:
Could you please update the RFC with some performance numbers, including
the used methodology? The number of 5% has been floating around, but it's
not clear what it refers to. I'm primarily interested in end-to-end effect,
e.g. on the symfony demo project.
I have updated the RFC with the following:
Testing suggests that autoloading through an internal classmap delivers around 5% performance increase vs a userland function call (e.g. composer).
This is 5% of the cost of the autoloading, and not the execution as a whole. Testing was performed by creating 50,000 empty classes each in an individual file, and then autoloading every one of them in a loop. Amount of classes was purely to help reduce noise.
Average for internal classmap was 0.295 vs 0.313 for spl_autoload_register representing 5.9% difference (in autoload performance only).
I appreciate this is a small amount. If internals feels the additional code is not worth it for such a small gain, I have no issue at all with the RFC being rejected.
Mark Randall