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74e204d952
DrawTriangles is expensive and slow because of massive memory allocation and garbage collection costs. This patch moves from ~47TPS on my laptop (with ~24k triangles) to 60TPS. The first part is just allocating the right size of vertex buffer up front; that got to about 55TPS. The second part replaces the frequent allocations of []float32 in Vertex() calls with writing the desired values into a provided destination slice. Time spent in drawing triangles for 1,000 frames: 13.07s baseline 11.09s preallocate whole buffer to avoid resizing 6.13s use new PutVertex function This might need some cleanup, but I think it's good evidence that the design change is viable. |
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| .. | ||
| compositemode.go | ||
| copy_test.go | ||
| copy.go | ||
| filter.go | ||
| mipmap_test.go | ||
| mipmap.go | ||
| vertices.go | ||