Optimize write throughput: release indexLock before 16KiB data copy#1

Merged

lostmsu merged 10 commits intomasterfrom

copilot/optimize-throughput-16kib-blocks

Mar 24, 2026

Commits on Mar 20, 2026

Initial plan
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Optimize write throughput: release indexLock before 16KiB data copy

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Add before/after write throughput comparison test

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Add direct BlockCache correctness stress test

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Polish before review: fix unused exception var, add hoisting comment

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Remove throughput comparison test and old code path

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Fix write-before-index-update ordering in BlockCache.WriteAsync

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Three-phase write: placeholder persisted index, restore early indexLock release

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Revert to cfb1e15: indexLock intersection is sufficient; no special index ordering needed

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Commits on Mar 24, 2026

Remove single-use wrapper methods UpdateDictionary and CommitEntry from BlockIndex

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