June 2026 monthly summary for facebook/folly: Key features delivered: - IoUring iowait accounting disable option: Implemented IoUringOptions::disableIoWait to disable iowait accounting by invoking io_uring_set_iowait(false) in IoUringBackend::delayedInit. This yields more accurate performance metrics by preventing iowait inflation when no real I/O is outstanding. Gracefully degrades on kernels without IORING_FEAT_NO_IOWAIT (-EOPNOTSUPP). Commit: a3bce7d6f68e6c7732e339847cf3327974fb4f74. Major bugs fixed: - IoUringBackend initialization safety improvements: Zero-initialized members and locals, removed redundant memset calls, and value-initialized io_uring_params and ioRing_ at declaration to satisfy uninitialized-variable linters. No functional changes. Commit: 8bb2142e6fe0e7728277b92eecd0b020598b05bf. Overall impact and accomplishments: - Improved telemetry accuracy and reliability for IO-related metrics, aiding performance analysis and capacity planning. - Strengthened code safety and maintainability with lint-compliant initialization, reducing risk of uninitialized reads across the IoUring path. Technologies/skills demonstrated: - C++ (IoUring integration), io_uring API usage, kernel feature awareness (NO_IOWAIT), code health and lint compliance, safe initialization patterns, and peer review discipline.