Use PresentMode::Mailbox when available. #712
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This provides much better latency by default on X11 and Wayland.
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This is listed as a NoVsync mode in wgpu's docs. We kind of do want vsync behaviour for our use case, because power efficiency is something we want to at least aim for.
I presume you've confirmed that this doesn't lead to more frames than are displayed being rendered?
No, I meant this to show what latency is left on the table for interactions by not rendering immediately. By default Fifo and FifoRelaxed introduce a lot of latency even on systems with plenty of throughput. In practice, when we have animations in the mix, we have to be limiting somehow. |
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Probably there's a middle ground where we configure the FIFO. Floem always uses FIFO, but asks wgpu to try to limit the depth to two frames. |
This provides much better latency by default on X11 and Wayland.