perf: drop grep/closure indirection in winnowNodes#557
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In the same spirit as PuerkitoBio#545, replaces costly grep() with a loop. While escape analysis managed to stack-allocate the per-node Selection through grep's inlining, the closure capture itself (nodes and keep) was still heap-allocated. Local benchmarks are showing a 30% allocs/op reduction, and a ~10-20% reduction in sec/op.
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In the same spirit as #545, replaces costly grep() with a loop.
While escape analysis managed to stack-allocate the per-node Selection through grep's inlining, the closure capture itself (nodes and keep) was still heap-allocated. Local benchmarks are showing a 30% allocs/op reduction, and a ~10-20% reduction in sec/op.