WinDirStat – Windows Directory Statistics

Original Article ↗ Hacker News Discussion ↗

WinDirStat, a long‑standing Windows utility that visualizes disk usage with treemaps, is praised for its tiny, stable binary that still runs flawlessly on modern Windows despite seeing little recent development. Many comments compare it to newer tools such as WizTree, TreeSize, SpaceSniffer, and various Linux and macOS equivalents, highlighting trade‑offs between speed (often via direct NTFS Master File Table access), open‑source licensing, UI design, and support for edge cases like hard links, compression, and cloud storage. Several users note that while faster or more polished alternatives exist, WinDirStat remains “good enough” for occasional troubleshooting when a drive mysteriously fills up.

WinDirStat’s role and current status

  • Many still use WinDirStat as a reliable, “finished” tool for occasional disk cleanups; its age and stability are seen as virtues.
  • Others view it as effectively abandonware: slow, outdated UI, and lacking features like console mode or better handling of hard links, NTFS compression, and junctions.
  • It remains popular in IT environments because it’s small, portable, and runs on very old to current Windows versions.
  • A new “windirstat-next” effort on GitHub claims major performance improvements, lower memory usage than some competitors, and better network path scanning, with betas available.

Performance and MFT-based tools (mostly Windows)

  • WizTree is repeatedly cited as dramatically faster (often “tens of times”) than WinDirStat by reading NTFS’s Master File Table (MFT) instead of walking directories.
  • Downsides noted: requires admin-level access to the MFT, doesn’t help on network shares or non-NTFS targets, and is no longer free for commercial use.
  • Alternative projects: altWinDirStat and FastWinDirStat attempt similar speedups; one fork likely violates the GPL by combining GPL code with proprietary components.
  • Other GUI tools mentioned: TreeSize (Free/Pro), SpaceSniffer, SpaceMonger (now OSS v1.4), Diskitude, Filelight, Disk Inventory X, GrandPerspective, DaisyDisk.

CLI / Unix-like and cross-platform alternatives

  • Popular terminal tools: ncdu, gdu, dust, godu, dua, diskonaut, plus rclone ncdu for cloud storage like Google Drive.
  • GUI tools on Linux/BSD: QDirStat, Baobab, fsview, mate-disk-usage-analyzer; macOS options include DaisyDisk, OmniDiskSweeper, GrandPerspective, Disk Inventory X.
  • Android suggestions include DiskUsage and Xplore’s built-in analyzer.

Filesystem, permissions, and OS behavior

  • Direct MFT reading is fast but bypasses some abstractions, is racy under concurrent changes, and must contend with NTFS features (hard links, sparse files, reparse points).
  • Several comments stress that reading the MFT needs elevated rights and can’t be done for network shares or virtual drives; tools fall back to slower directory APIs there.
  • In multi-user or server setups, WinDirStat can misreport used space due to permission issues; running as SYSTEM or using MFT-based tools can help.
  • There is debate over why Microsoft Explorer and Windows Search don’t use MFT-based shortcuts; suggested reasons include complexity, security, API stability, and anti-trust concerns.

Visualization and UX

  • Treemaps and sunburst charts are seen as the two best paradigms for visualizing hierarchical disk usage.
  • Users debate aesthetics and clarity across tools, but agree that fast feedback (near real-time updates, instantaneous scans) strongly changes how often they use these analyzers.