Oh god. He is registering yet another autoloader for count($this->loaders) TIMES count($collections).

https://github.com/WPTRT/autoload/blob/master/src/Loader.php#L102

Can it be any more inefficient? Just shoot me now. Ugh.

-Mike

P.S. Core should have ONE autoloader function — that only runs a tiny amount of code for each attempt to load a class file — for all themes and for plugins) to use, and they should do it via a class map created with a build script just like themes create CSS from SCSS files today.

Every theme and every plugin creating their own autoloaders is just a nightmare.