- Improved JetStream and filestore performance: faster TTL handling, reduced lock contention, binary search for timestamp lookups, and fewer heap allocations.
- Fixed numerous bugs and panics, including use‑after‑free in the flusher, incorrect SIGTERM exit code, Raft non‑leader append entries, data races, and corrupted message handling.
- General statistics for gateways, routes, and leaf connections are now omitted from accstatsz when empty, and several edge‑case errors (e.g., subject tree intersection, stream deletion) are handled correctly.
Release v2.11.10
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;