Two-phase approach speeds up cold-cache generate #84
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Phase 1 - Discovery (WalkParallel) - Only collect file paths - no I/O - Create placeholder ProjectFile with owner: None - WalkParallel threads stay fast and unblocked Phase 2 - Processing (Rayon) - After all files discovered, process them in parallel with rayon - Call project_file_builder.build() to read files and check cache - Rayon's work-stealing thread pool is optimized for I/O-heavy tasks - No contention with file discovery
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Phase 1 - Discovery (WalkParallel)
Phase 2 - Processing (Rayon)