[frankenst1]

> Having one more "spare" slot on the belt (e.g. triple- instead of double-buffering) can help to smooth over unpredictable spikes caused by other systems, but it always costs one more frame of latency even if the spare slot isn't usually needed.

This is not correct:

If your application frame rate is higher than your display refresh rate, triple buffering has lower latencies than double buffering. This is due to much more frames being rendered (and most of them discarded) so that the average age of the last frame rendered before being sent to the display is much younger (but never older) as in double buffering.

In terms of latency: VSYNC off < Triple Buffering < Double Buffering.