forked from bartvdbraak/blender
Cycles: Use better policy for primitive array resize for spatial split
Gives around 50% of spatial split BVH build speedup with grass field from cassette player shot from Gooseberry.
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@ -533,11 +533,9 @@ BVHNode* BVHBuild::create_leaf_node(const BVHRange& range)
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/* Extend an array when needed. */
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if(prim_type.size() < range.end()) {
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assert(params.use_spatial_split);
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/* TODO(sergey): We might want to look into different policies of
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* re-allocation here, so on the one hand we would not do as much
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* re-allocations and on the other hand will have small memory
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* overhead.
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*/
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prim_type.reserve(references.size());
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prim_index.reserve(references.size());
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prim_object.reserve(references.size());
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prim_type.resize(range.end());
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prim_index.resize(range.end());
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prim_object.resize(range.end());
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