Comment 1 for bug 1578159
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| Kevin DuBois (kdub) wrote Re: performance dip with nbs and overlays on | #1 |
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bbfa235
(Get the code!)
seems what's happening is an overlaid buffer is returned to the client that has a raised fence. The delay is cleared shortly, but the delay is unnecessary, and when combined with the correct load, causes quantization down to 1/2 vsync (sporaditally). We always have a spare, unfenced buffer around to give out, so we should prefer to give that out.