Vulkan: Batch vertex buffer updates #4843
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Some games can bind a large number of vertex buffers for draws. This PR allows for vertex buffers to be updated with one call rather than one per buffer. This mostly affects the AMD Mesa driver, the testing platform was Steam Deck with Super Mario Odyssey. It was taking about 12% before, should be greatly reduced now. A small optimization has been added to avoid looking up the same buffer multiple times, as a common pattern is for the same buffer to be bound many times in a row with different ranges.
riperiperi
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riperiperi
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gdkchan
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May 7, 2023
marysaka
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May 8, 2023
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This PR batches together vertex buffer updates to reduce the number of individual calls to update vertex buffers. It also avoids rebinding vertex buffers that have not changed, which is common when games are doing instanced rendering.
Improves performance slightly on BOTW on my system. Some areas bind more vertex buffers per draw than others.
Note that any improvement greatly depends on the game and the driver.