Redis: Module APIs and Performance Improvements
Redis merged seven pull requests focusing on new module APIs, performance optimizations, and CI infrastructure improvements. Key changes include a new cluster slot range API for modules and fixes for cache line false sharing in IO thread statistics.
Duration: PT1M56S
Transcript
Good morning, this is your Redis development briefing for May 26th, 2026.
Seven pull requests were merged over the weekend, headlined by significant module and performance improvements.
jjz921024 merged the addition of a new Redis Module API called RM_GetClusterNodeSlotRanges. This allows modules to query slot ranges for any cluster node by node ID, expanding beyond just local node queries. The change adds 108 lines across six files and includes comprehensive test coverage for atomic slot migration scenarios.
YangboLong merged a performance fix addressing cache line false sharing on per-IO-thread stat counters. The solution moves stat_io_reads_processed and stat_io_writes_processed counters from the main redisServer struct into individual IOThread structs, eliminating cross-thread contention by ensuring each thread's counters sit on separate cache lines.
gentcys merged GitHub Actions workflow improvements, adding concurrency groups to automatically cancel stale workflow runs. This change affects seven workflow files and should reduce resource usage in the CI pipeline.
vitahlin contributed three merged fixes: adjusting fastfloat tests to handle libc-dependent NaN payload parsing differences across platforms, fixing a flaky redis-cli reverse search test by increasing the empty-read threshold, and updating GitHub Actions dependencies ahead of Node.js 20 deprecation.
dariaguy merged the removal of the handle-werrors target from the modules Makefile, simplifying the build process by eliminating the DISABLE_WERRORS option.
What's next: The new module API will enable more sophisticated cluster management tools, while the IO thread performance fix should improve multi-threaded workload efficiency.
That's your Redis update. We'll be back tomorrow with the latest developments.