Fast macOS disk analyzer — scan, explore, clean up.

• Scans your entire disk in ~3 minutes (6.8M files) using parallel traversal
• Stores results as DuckDB snapshots — compare before/after cleanup
• Explores interactively via ncdu-style TUI
• Exports HTML cleanup reports with actionable commands

cargo install --git https://github.com/biliboss/disky

Or download a pre-built binary from Releases.

# Scan and open TUI
disky scan /
disky

# CLI queries
disky top          # largest files
disky dirs         # largest directories
disky ext          # usage by extension
disky find "*.log" # find by pattern
disky stats        # totals
disky list         # available snapshots

• jwalk parallel traversal — uses all CPU cores
• getattrlistbulk macOS syscall — batch metadata fetch (vs one syscall per file in readdir)
• memchr — SIMD extension extraction, zero allocations
• DuckDB Appender — 50k-entry batch inserts, columnar storage
• Release profile — LTO thin, codegen-units=1, panic=abort

Benchmarks on a 500GB SSD with 6.8M files:

• Scan: ~3 min
• Query (top 50 files): <100ms
• TUI startup: <2s

Snapshots live in ~/Library/Application Support/disky/YYYY-MM-DD_HH-MM.db.

disky list                          # show all snapshots
disky tui --db /path/to/snap.db    # open specific snapshot

• macOS 12+ (arm64 or x86_64)
• Rust 1.75+ (for building from source)

MIT — see LICENSE