[6.8.0] 3-4x slower SMB directory listing + other SMB performance regressions
2 issues I've noticed through testing:
[detectable on all directory sizes] Each directory listing is ~3-4x slower on average on v6.8 vs v6.72 (2.5s vs 0.7s for a 6k file directory)
[detectable for very large directory sizes] Trying to open a single NONEXISTENT file in a 250k file directory on 6.8 (should be microseconds per attempt), every 100 or so attempts, it hangs for ~5s
Initially, thought it had to do with concurrent calls, but it doesn't. Concurrent ca
Minor
smb672.txtsmb680.txt
Attaching the testparm outputs. I also tried some debugging after rolling back again to the previous version. I see two differences in behavior
- Each os.listdir call is ~3-4x slower on average on v6.8 vs v6.72 (2.5s vs 0.7s for a 6k file directory)
- When calling os.stat on a single NONEXISTENT file in a 250k file directory on 6.8 (should be microseconds per call), every 100 or so calls, it hangs for ~5s
Concurrent calls are simply additive