Profiling PHP Performance Issues During Migration from Laravel 5.5 to 8.0
I'm performance testing and Hey everyone, I'm running into an issue that's driving me crazy. I'm sure I'm missing something obvious here, but Working on a migration project where we are upgrading our Laravel application from version 5.5 to 8.0 has led to some unexpected performance issues. After running some benchmarks, I noticed that several API endpoints are taking significantly longer to respond than before. For instance, one particular endpoint that fetches user data is slowing down from an average of 100ms to over 400ms, which is quite concerning. To address this, I started by enabling query logging in Laravel to inspect the queries being executed. Using `DB::enableQueryLog()` gave me a clearer picture, but it didn't reveal any obvious problems. Here's a snippet of the code for that endpoint: ```php public function getUserData(Request $request) { $users = User::with('profile', 'posts')->get(); // Eager loading relations return response()->json($users); } ``` The eager loading should ideally reduce the number of queries, yet it seems to have added to the overall response time. To further investigate, I utilized Laravel Telescope for monitoring queries and spotted that some relationships were not indexed properly in the database. After indexing the `user_id` column in the `posts` table, the performance improved slightly, but not enough. I also examined the middleware and noticed we're using several heavy operations that might be affecting the performance. Conversely, when I disabled one middleware that logs every request, the response times dropped significantly. Were there any other best practices or optimization strategies I might be missing? Is it worth exploring caching mechanisms like Redis for this specific endpoint? Any insights on improving the performance during this migration would be greatly appreciated. My development environment is Windows. For context: I'm using Php on Linux. I'm developing on Ubuntu 22.04 with Php. Any advice would be much appreciated.