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* FUSE VFS performance: attr cache, selective invalidation, init tuningSulfurNitride2026-03-081-0/+205
- Increase ATTR_CACHE_SECONDS from 1.0s to 30.0s (90% getattr reduction) - Replace nuclear clearDirCache() with selective invalidateDirCache() that only clears the affected parent directory instead of all caches - Add mo2_init callback: enable FUSE_CAP_AUTO_INVAL_DATA for kernel page cache retention across open/close, increase max_readahead/max_write to 1MB - Switch open_files_mutex to shared_mutex for concurrent read access - Add perf handoff doc for VFS optimization history Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>