Precalculate distances for sort #33
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Backports distance caching optimisation from Rust: mourner/delaunator-rs#3 Some data points from benchmark from my machine (before/after): uniform: 1000000: 1624.276ms 1437.700ms gaussian: 1000000: 1522.548ms 1287.702ms grid: 1000000: 1369.310ms 1212.476ms degenerate: 1000000: 758.197ms 403.011ms
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Backports distance caching optimisation from Rust: mourner/delaunator-rs#3
Some data points from benchmark from my machine (before/after) for 1M points: