CALayer Live Resize Poor Performance
-(void)setFrameSize:(NSSize)newSize
{
    if (inLiveResize) {
        NSRect scrollFrame = [[[self superview] enclosingScrollView] documentVisibleRect];

        BOOL condition1 = (self.frame.origin.y > (scrollFrame.origin.y - self.frame.size.height));
        BOOL condition2 = (self.frame.origin.y < (scrollFrame.origin.y + scrollFrame.size.height + self.frame.size.height));

        if (condition1 && condition2)
            [super setFrameSize:newSize];
    }
    else {
        [super setFrameSize:newSize]; }}