Question

I have an NSOperationQueue to which i have added my custom class’s objects(inherits from NSOperation) i have set the “setMaxConcurrentOperationCount” to be 1. But when i cancel all the operations like this:

[mOperationQueue cancelAllOperations];

it takes about 10 -15 seconds sometimes to cancel them all.

NSOperationQueue contains about 60-80 tasks(Operations).

Initially i was canceling the operations in main thread which obviously blocked the main thread but now i have done that in a different thread.But my main issue is that it takes too long.
Any Suggestions ?

Answer 1

Your operation should check to see if it’s been cancelled more often (e.g. in its implementation of -main).

Beyond that, run a sampler to see what is taking all that time.