Month: 2025-09 — Summary of key outcomes: Delivered GarnetServer RollForward: LatestMajor feature for microsoft/garnet, enabling automatic use of the latest major dependency versions to improve compatibility and security; addressed issue #1374. Focused delivery with a single feature, clear commit tracing, and alignment with upgrade and security goals. Overall, this work improves upgrade readiness, reduces dependency drift, and strengthens the security posture of the Garnet server stack.

This month focused on delivering high-impact enhancements to HybridCache across two core repositories, aligning documentation with performance-focused API changes, and enabling zero-allocation paths to reduce GC pressure in high-throughput workloads.

April 2025 monthly summary for the aspnet/Benchmarks repository focused on delivering performance and type-safety improvements to Dapper benchmarks. Implemented DapperAOT, command caching, strict type mapping, and explicit column hints within the benchmarks, with added support for older SDK interceptor usage. This work enhances benchmark fidelity, reduces runtime overhead, and improves compatibility with older tooling.

March 2025 performance summary: Delivered key HybridCache improvements across dotnet/extensions, dotnet/aspnetcore, and docs, anchored by a GA-ready release and targeted bug fixes that improve data freshness, stability, and production readiness. Implemented L2-precedence for expiration to prevent stale data; enhanced JSON field-only type detection for serialization; stabilized cache initialization by deferring metadata checks to avoid DI cycles; upgraded core dependencies for benchmarks to ensure compatibility; documented and released HybridCache as GA-ready in Docs.

In February 2025, delivered multiple high-value cache improvements across three repositories, setting the foundation for faster, safer caching and easier adoption at scale. The work spans GA-ready HybridCache enhancements, improved cache-key guidance, and a new MemoryCache API, with documentation updates to align developer guidance with performance realities.

January 2025 performance summary: Delivered two high-impact features across core runtime and web hosting layers, focused on observability and cache performance. For dotnet/aspnetcore, introduced a HybridCache usage signal in RedisCache to clearly indicate when HybridCache is active, improving operators’ ability to monitor and diagnose caching behavior. For dotnet/runtime, implemented MemoryCache performance enhancements by separating string and non-string keys into distinct collections to speed up string key re-hashing, applied Marvin hashing for down-level TFMs, and added tests to verify correct handling of mixed key types. While there were no critical bug fixes highlighted this month, these changes reduce latency, improve cache hit performance, and enhance telemetry, contributing to better scalability and reliability for applications relying on Redis-backed caches and MemoryCache. Tech stack: C#, .NET, Redis, MemoryCache, hashing optimizations, unit tests, observability improvements. Commits: c4c8d3a692d2ea94e945276825bb4e7a0b564a3d; d90c2e5408419a22ad70133bead41111e119012f.

December 2024: Stabilized the HybridCache test suite in dotnet/extensions by pinning System.Runtime.Caching to override a transitive dependency, delivering deterministic test results and strengthening CI reliability.

November 2024: Delivered key features across three repositories with a focus on reliability, documentation, and deployment tooling. Notable work includes substantial HybridCache stability, logging, and cancellation handling improvements in dotnet/extensions, alongside a documentation update clarifying HybridCache's preview status. Packaging Garnet Server as a .NET global tool enables streamlined installation via dotnet tool install and updated usage docs, improving developer experience and deployment consistency.