2026-05 monthly summary focusing on facebook/CacheLib work. Highlights include a targeted concurrency correctness fix that uses a ThreadSanitizer annotation on allocSize reads in getRandomAlloc to suppress benign races and preserve correctness of the sampling function when slab headers transition between allocation classes. The improvement keeps the sampling path best-effort but validates the sampled item at the call site to ensure safety. This work was implemented with a Diff/Differential Revision (D103780529) and prepared for release, with on-call context noted for coordination.

February 2026: Maintained and stabilized the folly codebase with a targeted cleanup in Collect.h. Removed an unnecessary #include <functional>, reducing header dependencies and streamlining compilation. The change was implemented in commit b07ac6cfd4477686ee3364ae698ab77ebaa2684d, and reviewed by DenisYaroshevskiy (Differential Revision: D92200867). This maintenance effort improves build reliability, shortens compile times, and simplifies future maintenance without impacting functionality.

For 2025-09, the Folly repository delivered targeted code cleanup and structural simplification, focusing on reducing build-time dependencies and aligning with modern C++ practices. The changes improve long-term maintainability and performance while preserving functionality.