Micro Optimization

[mattamon]

Use imports for standard php functionality since it seems that they are slightly faster that way.

See https://www.deviaene.eu/articles/2023/why-prefix-php-functions-calls-with-backslash/

[jdreesen]

You should use the PHP-CS-Fixer to do this automatically (for all of Pimcore).

I propose the following config (that's also how Symfony does it):

'native_function_invocation' => [
    'include' => [
        '@compiler_optimized',
    ],
    'scope' => 'namespaced',
    'strict' => true,
],

This will automatically fix all functions that are worth it. The functions in @compiler_optimized are specifically optimized in the Zend engine/Opcache, but only if the compiler can be sure the these are the global functions (so without the leading backslash/import they are not optimized)!

Any other function is not worth it in my eyes, it's just noise in the code with all those extra backslashes/imports. Yes, it is a tiny bit faster, but not really measurable and only on the very first function call, because after that Opcache remembers if it's a global function or not. So it may make a difference if you don't have Opcache enabled, but in that case everything is slow anyway, and it doesn't matter.

P.S. there's also native_constant_invocation which could be enabled to speed up constant resolving.

[mattamon]

Closed with #201