- Upgrade to Go 1.19.10 and update core dependencies (golang.org/x/crypto, golang.org/x/sys, nats.io/nats.go).
- JetStream performance and reliability upgrades: optimized ack floor checks, clustered‑only account updates, improved R1 consumer cleanup, faster KV get lookups, and correct handling of extended purge replays.
- Stability fixes: resolve potential panics, data races, leafnode interest propagation issues, queue‑group request distribution, and encrypted‑stream recovery failures on server restart.
Release v2.9.18
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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;