Actually, the secret sauce to both WizTree's and Everything's speed is the NTFS Master File Table (MFT) [1].
[1]: https://learn.microsoft.com/en-us/windows/win32/fileio/maste...
Have never been able to find anything.
SwiftSearch is excellent and uses the same tech: https://sourceforge.net/projects/swiftsearch/
Probably worth benchmarking against fzf/ripgrep when I can find the time.
Have never been able to find anything.