from Hacker News

Microsoft is testing ReFS for new Windows 11 installs

by thecosmicfrog on 4/5/25, 12:44 AM with 5 comments

• by replete on 4/5/25, 7:40 AM

  I found around 6-15% performance improvement in build times after implementing DevDrive (mounted VHD) on Windows machines, which uses ReFS. Deleting huge folders was also perceivably faster.

• by cors-fls on 4/5/25, 2:00 PM

  I have been made aware of ReFS thanks to the "Dev drive"[1] technology in Win11. ReFS is apparently particularly suited to store source code and code artifacts for dev workloads.

  I have been using it (dedicated DevDrive partition) for some time but performance improvement are subtle and not easily visible without measurements. Which I haven't done.

  [1] https://learn.microsoft.com/en-us/windows/dev-drive/

• by myrandomcomment on 4/6/25, 1:30 AM

  IIRC, because I am old, NT 3.1/3.51 supported HPFS from OS/2. Now get off my lawn.

• by hulitu on 4/5/25, 7:42 AM

  > Microsoft is testing

  This is a contradiction in terms. Microsoft doesn't test anything. Always the user has to do it.