CADisplayLink is better

[marcocattai]

if (kUseBackgroundThread) { [NSThread detachNewThreadSelector:@selector(updateLoop) toTarget:self withObject:nil]; } else { displayLink = [NSClassFromString(@"CADisplayLink") displayLinkWithTarget:self selector:@selector(updateTVOut)]; [displayLink setFrameInterval:1.0]; [displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; }