App processor usage increasing over time - ios

Question

I have been struggling with this problem for over one month trying to to figure out what is causing it with no solution. Since the code is pretty long i wouldn't be able to post it here.
Basically i have made drawing app. When you dubble tap the screen the screen and everything will reset, almost like I am reloading the view. When i reset the scene the processor usage will go down to around 9%, but then when i start drawing again the processor usage will go up to where I last ended. So say for example i draw and image and the processor power goes up to 50%, then dubble tap to reset the view to what is what from the beginning it will go down to 9%. Then when i start drawing again it will go up to 50%, and next time 60%,70% etc.
Maybe it is hard for you to see what is causing the problem due the lack of information so I could send my source code if someone is interested helping me by PMing me.
greentimer = [NSTimer scheduledTimerWithTimeInterval:0.02 target:self selector:#selector(movement2) userInfo:nil repeats:YES];
-(void)movement2{
static int intigrer;
intigrer = (intigrer+1)%3;
UIGraphicsBeginImageContext(CGSizeMake(320, 568));
[drawImage.image drawInRect:rekked];
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextSetLineWidth(ctx, 8.0);
CGContextSetRGBStrokeColor(ctx, r12, g12, b12, 1);
CGContextBeginPath(ctx);
if (intigrer == 1 && integrer2 < greenran - greenran2) {
CGPathMoveToPoint(path, NULL, greentmporary.x, greentmporary.y);
CGPathAddLineToPoint(path, NULL, greenpoint1.x, greenpoint1.y);
}
green.center = greenpoint1;
if (integrer2 < greenran - greenran2) {
CGContextMoveToPoint(ctx, greentmporary.x, greentmporary.y);
CGContextAddLineToPoint(ctx, greenpoint1.x, greenpoint1.y);
}
CGContextStrokePath(ctx);
[drawImage setFrame:CGRectMake(0, 0, 320, 568)];
drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// [self updatePoint2:YES];
static BOOL yes;
if (!yes) {
[self.view insertSubview:drawImage atIndex:0];
yes = YES;
}
ctx = nil;
}

Answer 1

You need to release your CGPaths and CGImages
CGPathRelease(path);
CGImageRelease(image);
CGContextRelease(context);

Answer 2

I think your problem is that you are making self.view more complex by each fire of the timer because you keep adding subviews to it. So the complexity of your scene increases each time its rendered until its completely reset. I could not really follow all your code, to be honest, as I am not familiar with what you are trying to achieve.
I think an approach to solving the problem is to run your program with Instruments with the Profile option (instead of doing a 'Run'). Select the 'Automation' template.
There is a way to issue logElementTree() on your running program and it gives a dump of the UIView hierarchy with images. There are lots of good articles on it, e.g.
http://cocoamanifest.net/articles/2011/05/uiautomation-an-introduction.html