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Engine
v4.1.0
Merges no longer hold the collection write lock for their full duration — worst-case concurrent search stall during indexing drops from 1.92s to 233ms.
View release on GitHub- Merging splits into snapshot → build → swap; only snapshot/swap hold the collection's write lock, not the full merge.
- Fixed a tombstone-pruning bug (segment presence bitmap vs. declared range) surfaced by the new off-lock timing.