PHP 8.2 - Performance implementing Custom Class Autoloading in a Large Project
I've looked through the documentation and I'm still confused about I've spent hours debugging this and I'm migrating some code and I'm having a hard time understanding I'm experiencing important performance optimization when using a custom autoloader for my PHP 8.2 application that has grown quite large over the past year... The application comprises multiple namespaces and classes, and I initially implemented the autoloader using the `spl_autoload_register` function. However, as the number of classes increased, I noticed that the time taken to load classes has drastically increased, with some requests taking several seconds to complete. Here is a simplified version of my autoloader implementation: ```php function myAutoloader($class) { $file = __DIR__ . '/src/' . str_replace('\\', '/', $class) . '.php'; if (file_exists($file)) { require_once $file; } } spl_autoload_register('myAutoloader'); ``` While this works for loading classes, I've noticed that during peak times, it results in excessive file system calls, which I suspect is causing the slowdown. I've tried implementing caching with APCu to cache the paths of the loaded files: ```php function myAutoloader($class) { $cacheKey = 'autoload_' . $class; $file = apcu_fetch($cacheKey); if ($file === false) { $file = __DIR__ . '/src/' . str_replace('\\', '/', $class) . '.php'; if (file_exists($file)) { apcu_store($cacheKey, $file); require_once $file; } } else { require_once $file; } } spl_autoload_register('myAutoloader'); ``` However, this hasn't made a noticeable difference in loading times. I even tried profiling the application using Xdebug, and it confirms that class loading is a bottleneck. I suspect that the current autoloader implementation just isn't efficient enough for the scale of my application. Is there a more efficient way to manage class loading in PHP 8.2 that could help improve performance? What are best practices for autoloading in large applications? Any insights would be greatly appreciated! Any ideas how to fix this? I'm working on a microservice that needs to handle this. What's the correct way to implement this? I'm working on a service that needs to handle this. Any advice would be much appreciated. My development environment is Linux.