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1196568a7c
The VBO renderer needs to generate a buffer with two quads for each cell, and then transfer it to the GPU. For large monitors, generating this buffer can get quite slow. Most of the issues come from IVertexBuilder (VertexConsumer under MojMap) having a lot of overhead. By emitting a ByteBuffer directly (and doing so with Unsafe to avoid bounds checks), we can improve performance 10 fold, going from 3fps/300ms for 120 monitors to 111fps/9ms. See 41fa95bce4408239bc59e032bfa9fdc7418bcb19 and #1065 for some more context and other exploratory work. The key thing to note is we _need_ a separate version of FWFR for emitting to a ByteBuffer, as introducing polymorphism to it comes with a significant performance hit.