perf: improve ground generation cache locality #695
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Pull request overview
This PR refactors the ground generation algorithm to process blocks in a chunk-by-chunk manner rather than iterating through the entire world in X-Z order. This optimization improves CPU cache locality by keeping the same region/chunk HashMap entries hot in the cache, reducing cache misses during iteration.
Key Changes:
- Restructured ground generation loops to iterate by chunks (16×16 blocks) first, then iterate within each chunk
- Added chunk coordinate calculations using bit shift operations for efficiency
- Included boundary clamping to handle partial chunks at the edges of the bounding box
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⏱️ Benchmark run finished in 0m 28s 📈 Compared against baseline: 30s 🟢 Generation time is unchanged. 📅 Last benchmark: 2026-01-06 16:15:04 UTC You can retrigger the benchmark by commenting |
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