8df0690ab4
Retrieve the index buffer data as a span and set it directly rather than using the API functions to add vertices which add overhead. Also pass all the necessary data as arguments instead of retrieving them from the "args" struct on every use. In a test with a 16 million vertex grid, this reduces the runtime of generating all the wireframe index buffers by about 25%, from 95 to 76 ms for that step of the drawing process.
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