Dokan mirror.exe smb performance

[s1lverkin]

Hello,

I am trying to mount a SMB share via Dokan, and it works quite well besides that performance is lacking.

When I am doing copy file from smb share test it takes like a 40s compared to 6s when done directly from SMB share.

OS: Windows 11 24H2

Is there anything that I can do to speed up this?

[Liryna]

Hi @s1lverkin , you might be interested by #1246

[s1lverkin]

Hello @Liryna, I apologize, forgot to mention the performance especially with small files,

This one is with Dokany:

           Total    Copied   Skipped  Mismatch    FAILED    Extras
Dirs :        54        54         0         0         0         0

Files : 448 448 0 0 0 0
Bytes : 383.19 m 383.19 m 0 0 0 0
Times : 0:10:52 0:00:37 0:00:00 0:00:00

This one with direct SMB copy:

           Total    Copied   Skipped  Mismatch    FAILED    Extras
Dirs :        54        54         0         0         0         0

Files : 448 448 0 0 0 0
Bytes : 383.19 m 383.19 m 0 0 0 0
Times : 0:01:50 0:00:06 0:00:00 0:00:00

I didn't test it on the same directories, also was disconnecting/reconnecting after each test, so no caching in that matter.

Tried with /n flag, it didn't do anything to me. Also, tried /g, but it made it much more slower...

[Liryna]

@s1lverkin Could you see with procmon if there is extra activity generated by other applications that could explain why it is slower ?
And also see if the copy behavior differ (read size etc).