quad buffered frame rate confusion

[michaelrepucci]

No, the code doesn't write to disk on every frame, though it does do so after every trial - it is important to save experimental data after each trial in case of a crash, power-outage, or similar - which occurs irregularly, typically every 6 seconds (i.e., 6s x 120 Hz = 720 frames). But you're right, that does approximately account for the percent of frames that fluctuate significantly.

As another concern, I'm storing the frame timing in an array, which is appended on each frame. In Matlab - I have a lot of experience with Matlab - this would be very slow, and could be sped up by pre-allocating an array of the length I expect to use. Would this also speed up Python?