Hello, I saw this change to cygwin to ignore S-1-15-3-* SIDs: https://www.cygwin.com/cgit/newlib-cygwin/commit/?id=271f187b7b59a6645e24e9c36b60ba31f6527556
I think, though, that the current code doesn't completely skip resolving those never-resolving SIDs. I'm annoyed by those SIDs because they slow down any 'stat()' syscall, specially with active directory. Here are strace microsecond times (500ms): 387924 540348 [main] stat 1327 pwdgrp::fetch_account_from_windows: LookupAccountSid(S-1-15-3-65536-3323407561-2172269196-3486974656-4132058316-2250862433-3856296919-434318741-3760235072), Win32 error 1332 186045 726814 [main] stat 1327 pwdgrp::fetch_account_from_windows: LookupAccountSid(S-1-15-3-65536-3323407561-2172269196-3486974656-4132058316-2250862433-3856296919-434318741-3760235072), Win32 error 1332 That slows down a lot things like TAB-completion executing, depending on the latency of the AD connection. I think that the early part of fetch_account_from_windows should filter out S-1-15-3-* SIDs as well, instead of asking AD. What do you think? I never built cygwin and I don't know many of the implications if I tried to make the change on my own, so I hope someone aware can, if possible, prepare the patch. It should not be difficult for the acquainted. Regards, Lluís. -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
