CODEWITHSUNDEEP
iosprofilernsautoreleasepoolcifacefeature
Avba
Avba

Reputation: 15266

Memory usage of face detector not released

I'm using the iOS face detector on all possible orientations of an image like this

for (exif = 1; exif <= 8 ; exif++)
{
    @autoreleasepool {


    NSNumber *orientation = [NSNumber numberWithInt:exif];
    NSDictionary *imageOptions = [NSDictionary dictionaryWithObject:orientation forKey:CIDetectorImageOrientation];
    NSTimeInterval start = [NSDate timeIntervalSinceReferenceDate];

    glFlush();
    features = [self.detector featuresInImage:ciimage options:imageOptions];
    //features = [self.detector featuresInImage:ciimage];

    if (features.count > 0)
    {
        NSString *str = [NSString stringWithFormat:@"-I- found faces using exif %d",exif];
        [faceDetection log:str];
        NSTimeInterval duration = [NSDate timeIntervalSinceReferenceDate] - start;
        str = [NSString stringWithFormat:@"-I- facedetection total runtime is %f s",duration];
        [faceDetection log:str];
        self.exif=[[NSNumber alloc] initWithInt:exif];
        break;
    }
    else {
        features = nil;   
    }
    }

}

but it seems in the profiler that the memory is growing each time:

Not sure if this is true, and if so how to solve the issue

Sorted by overall bytes and still living

Detail of the category

The relevant code

Upvotes: 0

Views: 224

Answers (1)

sher
sher

Reputation: 49

In your loop most of the objects are auto-release type the main issue seems to be that you are assigning new value to "features" in each loop and if the "if" statement is true you are not making it nil. Try doing this:

if(features.count > 0)
{
  /// your existing code here
  features = nil;
  break;

}

Upvotes: 0

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