I am making a math related activity in which the user can draw with their fingers for scratch work as they try to solve the math question. However, I notice that when I move my finger quickly, the line lags behind my finger somewhat noticeably. I was wondering if there was some area I had overlooked for performance or if `touchesMoved` simply just doesn't come enough (it is perfectly smooth and wonderful if you don't move fast). I am using `UIBezierPath`. First I create it in my init method like this:

```
myPath=[[UIBezierPath alloc]init];
myPath.lineCapStyle=kCGLineCapSquare;
myPath.lineJoinStyle = kCGLineJoinBevel;
myPath.lineWidth=5;
myPath.flatness = 0.4;

```

Then in drawRect:

```
- (void)drawRect:(CGRect)rect
{
    [brushPattern setStroke];
    if(baseImageView.image)
    {
        CGContextRef c = UIGraphicsGetCurrentContext();
        [baseImageView.layer renderInContext:c];
    }

    CGBlendMode blendMode = self.erase ? kCGBlendModeClear : kCGBlendModeNormal;
    [myPath strokeWithBlendMode:blendMode alpha:1.0];
}

```

baseImageView is what I use to save the result so that I don't have to draw many paths (gets really slow after a while). Here is my touch logic:

```
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{

    UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
    [myPath moveToPoint:[mytouch locationInView:self]];

}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{    
    UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
    [myPath addLineToPoint:[mytouch locationInView:self]];
    [self setNeedsDisplay];
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{    
    UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 0.0f);
    CGContextRef c = UIGraphicsGetCurrentContext();
    [self.layer renderInContext:c];

    baseImageView.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    [myPath removeAllPoints];
    [self setNeedsDisplay];
}

```

This project is going to be released as an enterprise app, so it will only be installed on iPad 2. Target iOS is 5.0. Any suggestions about how I can squeeze a little more speed out of this would be appreciated.