WinSCP plugin upload speed is very low (vs WinSCP standalone

[crystalidea]

Same SFTP server, upload speed with WinSCP standalone (same PC) is greater at least in 30 times. Always reproducible.

Upload speed with

WinSCP plugin - 35-40 Kb/s (avg)
WinSCP standalone - 1.8 MB/s (started 300-400 Kb/s, 1 MB/s after 5 seconds, and 1.8 after 15 seconds)

File size - about 200 MB.

[Martin Prikryl]

Thanks for your report.

What version of WinSCP are you using?
Can you attach a complete session log file both from WinSCP application and WinSCP plugin?

[crystalidea]

SFTP server, port 22.

One more test from different PC, even different country:

winscp.spl - 1.6.9 (salamander 3.0 beta 4 x86) - 35 Kb/s upload
WinSCP 5.5.0 Build 3839, same file/server/folder, 256 KB/s upload

I'm not sure to share session logs because of privacy issues. I'm sure one is easily able to reproduce the problem.

[Martin Prikryl]

Can you please run the test using WinSCP 4.4 (version the plugin is based on)?
http://sourceforge.net/projects/winscp/ ... inSCP/4.4/

[crystalidea]

Yes, Martin, the same low speed with WinSCP 4.4, thanks.

Any plans to fix the plugin in Altap Salamander? This is a serious issue I think

[Petr Solin]

Thanks to Martin for the fix. I have built fixed version of WinSCP for 3.0 beta 4 and sent it by email to dufreyne. Please let us know if it helps.

I have tried it on my connection and instead of 350KiB/s it uploads at 850KiB/s, so it seems to solve the problem.

[crystalidea]

Confirmed, thanks, Martin & Petr!