Very bad performances using Progress Overlay

[JeanMeche]

Using the Progress Overlay I get very bad performances.

A background function that took 7sec to perform before (XML parsing+CoreData querying), takes now up to 24 seconds.

In my case I create the Progress Overlay on the main thread then create the launch my function in a background thread.

Before using the progress overlay, I had a simple UIView with a UIActivityIndicatorView spinning and no performance problem.

Am I missing something or does it really worsen the performances that much ?

Here is a sample of my code.

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{

        NSArray* filesToUpdate = [DataLoader checkUpdates];
        if(filesToUpdate.count) {

            dispatch_async(dispatch_get_main_queue(), ^(void) {

                self.progressOverlay = [MRProgressOverlayView showOverlayAddedTo:self.view animated:YES];
                self.progressOverlay.titleLabelText = @"Mise à jour des données";
                self.progressOverlay.tintColor = [UIColor colorWithRed:0.06 green:0.47 blue:0.73 alpha:1.f];

            });

            [DataLoader updateFiles:filesToUpdate];
            self.dataLoader = [[DataLoader alloc] init];
            [self.dataLoader loadRawDataIntoCoreData];
            NSLog(@"Done");
        } else {
            NSLog(@"Nothing to update");
        }

        dispatch_async(dispatch_get_main_queue(), ^(void) {
            [MRProgressOverlayView dismissOverlayForView:self.view animated:YES];
            [self closeSplashScreen];
        });

[mrackwitz]

Your code looks fine as far as I can tell. Have you tried to profile the code using Instruments.app to see where the time is actually spent? On which platform / device did you run the app, when you had the worse performance?