Unexpected Memory Leak When Using Blocks with NSOperation in Objective-C
I'm performance testing and I've been struggling with this for a few days now and could really use some help. I'm sure I'm missing something obvious here, but I'm facing a frustrating issue with memory management in my Objective-C application... I'm using `NSOperation` to perform asynchronous tasks, and I'm wrapping my operations in blocks. However, I'm noticing that my memory usage keeps increasing, and Instruments is showing a memory leak related to these blocks. Here's a simplified version of the code I'm using: ```objective-c NSOperationQueue *operationQueue = [[NSOperationQueue alloc] init]; for (int i = 0; i < 10; i++) { NSBlockOperation *operation = [NSBlockOperation blockOperationWithBlock:^(void) { NSLog(@"Operation %d started", i); // Simulate a task [NSThread sleepForTimeInterval:1]; NSLog(@"Operation %d completed", i); }]; [operationQueue addOperation:operation]; } ``` I'm careful to not create strong references to self or any other objects within the block. I'm using weak references in the block like this: ```objective-c __weak typeof(self) weakSelf = self; NSBlockOperation *operation = [NSBlockOperation blockOperationWithBlock:^(void) { __strong typeof(weakSelf) strongSelf = weakSelf; if (strongSelf) { // Use strongSelf safely } }]; ``` Despite this, when I run the application and perform these operations, Instruments reports a leak related to the block itself, specifically pointing to `NSOperation` retaining the block. I've tried switching to `NSInvocationOperation` to see if it behaves differently, but I still see the memory increase over time. Does anyone have insights on why this might be happening? Are there specific practices in using blocks with `NSOperation` that I might be overlooking? Also, I'm using Xcode 14.1 and targeting iOS 15.0. Any help would be greatly appreciated! For context: I'm using Objective-C on Windows. Thanks in advance! Thanks for any help you can provide!