Brief pause in animation every ~1 second

Hi everyone. I’m having an issue where there is a (very) slight pause about once per second when doing animation. It’s almost as if it’s duplicating a frame once per second, or skipping an update()/draw() cycle. I’m not sure what’s happening. Has anyone seen this, or have any suggestions? I’m using Visual Studio and I tried building in both debug and release modes and got the same result either way. I have also tried with/without setting vertical sync, with/without a call to ofSetFrameRate(), and in both windowed and fullscreen modes, all with the same result. Right now I’m doing 3d animation, but I tried stripping my application down to just animating a single line (changing the coordinate of an endpoint over time), and the problem is still there. Any help or suggestions would be greatly appreciated.

I forgot to mention that in my laptop I have both an integrated video adapter and a dedicated NVIDIA GPU, and the “pausing” occurs no matter which adapter I run the application with.

without more information, it’s hard to say, however it might be something in a for loop, where actually it’s not pausing, it’s just that the first or the final part of the animation is duplicated.
How are you animating?

Here is the relevant code:

void ofApp::setup()
	ofSetWindowShape(1920, 1080);

	ofSetColor(255, 255, 255);

	direction = true;

	for (int i = 0; i < 4000; i++)
		randoms.push_back(ofPoint(ofRandom(-1000, 1000), ofRandom(-1000, 1000), ofRandom(-1000, 1000)));

void ofApp::update()
	angle += 0.2;
	if (angle > 360)
		angle -= 360;

void ofApp::draw()
	ofBackground(0, 0, 0);

	ofTranslate(ofGetWidth() / 2, ofGetHeight() / 2);
	ofRotate(angle, 0, 1, 1);
	ofSetColor(255, 255, 255);

	for (int i = 0; i != randoms.size() - 1; i++)
		ofSphere(randoms[i], 5.0);


I should also mention I’m using Visual Studio Community 2015, not sure if that makes a difference. Most recently I tried targeting x86 instead of x64, with no difference in results. Again, simplifying this code to drawing a single line with a moving endpoint doesn’t help the issue. Thanks again.

I figured out the problem, it was f.lux. Killing f.lux completely solved the issue. Wanted to post in case someone else runs into the same thing.


f.lux as in the screen orangificator?