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Replaces per-call make([]string, 0, len(m)) with a sync.Pool of reusable key slices in EncodeMapSorted, encodeSortedMapStringBool, and encodeSortedMapStringString. Eliminates 1 alloc per sorted map encode for callers using SetSortMapKeys(true).
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Summary
[]stringkey slices viasync.Poolin the three sorted map encode functions (EncodeMapSorted,encodeSortedMapStringBool,encodeSortedMapStringString)SetSortMapKeys(true)callersBenchmark (no regression on default benchmarks; sorted-map alloc savings not measured by existing benchmarks)
Test plan
go test -count=1 ./...— all passgo test -short -race -count=1 -timeout=5m ./...— no races