Feature request - notify about missing optimizer for built-in PHP functions

[ondrejmirtes]

Let's say we want to write highly-efficient code. We rewrite code that initially existed in PHP and we want the Zephir counterpart to be as fast as possible. But Zephir currently does not have built-in optimizers for all PHP functions, only for some: https://github.com/zephir-lang/zephir/tree/development/src/Optimizers/FunctionCall

So if we use a function like array_last or https://www.php.net/manual/en/function.php-strip-whitespace.php, it's going to call back to PHP and it's going to be needlessly slower.

But it's hard to know about all unoptimized calls, that's why Zephir could notify about those, to see opportunities for optimization.