Comment 2 for bug 1557962
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| Daniel van Vugt (vanvugt) wrote Re: NBS fullscreen benchmark performance is much lower than BufferQueue | #2 |
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(Get the code!)
In case it's not obvious already - The need for 4 buffers in fullscreen mode is due to the simultaneous use of bypass/overlays and framedropping (swap interval 0). Both features require triple buffers, and if used together will require quad-buffers to avoid starving or at least stalling the the pipeline (which is the reduced performance you see).