March 2026 performance summary focused on stabilizing buffer pool sharing and hardware queue management across fbthrift and folly. Key improvements include correcting buffer pool math to prevent negative queue counts, adding explicit validation to require at least one hardware queue to avoid runtime errors, and reinforcing defensive checks around queue calculations. These fixes reduce runtime failures, improve IO throughput reliability, and lay the groundwork for robust io_uring-based workloads in production.

February 2026 performance summary across fbthrift, folly, CacheLib, and nimble. Focused on delivering robust IO-uring based features, purging experimental IO code paths, and stabilizing stress-test pipelines. Key outcomes include shader-like IO path modernization, safer stress-test configurations, and canonical path migrations that reduce technical debt and enable faster onboarding for new backends.

January 2026 performance-focused delivery across folly and fbthrift. Key accomplishments include: (1) folly IoUringBackend performance and BufferPool optimization: removed the copy constructor of IoUringBackend::Options and migrated to move semantics, enabling passing a BufferPool ExportHandle to the ctor and allowing shared BufferPool usage across I/O threads to reduce memory churn and improve throughput; (2) BufferPool sharing: added an export/import handle mechanism to enable sharing hardware queues among EVBs when beneficial; (3) Async Socket Binding Factory: introduced a factory method to bind async sockets to the correct source addresses/ports to produce Toeplitz hash collisions, improving load distribution; (4) Testing infrastructure: added mocks for set_socket_close_on_exec, close, bind, and socket operations to test the io_uring async socket factory, removing deprecated test sites and increasing coverage; (5) fbthrift Toeplitz Hashing Integration: added a static helper to bind io_uring sockets to the appropriate source port and connect to the queue matching the NAPI id, enabling Toeplitz hash collision as core functionality. Overall impact includes reduced memory churn, higher IO throughput, better queue utilization, and more robust test coverage, delivering measurable business value and stronger cross-repo alignment on Toeplitz hashing.)

Delivery of Dynamic Source Port Callback for IoUringBackend in folly (Dec 2025). Introduces a plug-in friendly option to set a dynamic source port based on destination address/port, including a new callback type and an extended options structure to support this functionality. The change is designed to optimize network performance and reduce port collisions, aligning with Toeplitz-hash considerations for high-traffic workloads via ephemeral Linux kernel port ranges.