SFTP is extremely slower than smb

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KennyLin
Posts: 4
Joined: Fri Apr 11, 2025 7:08 am

SFTP is extremely slower than smb

Post by KennyLin »

I tested the file transmission speed between 2 PC in the intranet.

Linux <-> Linux(local)
sftp : 60MB/s
smb : > 1GB/s

I know the file encryption affects transmission speed, and it depends on CPU.
But the transmission speed is still lower my expected.

Did I miss any setting or way to improve the transmission speed by using SFTP?
tobias
Posts: 1973
Joined: Tue Mar 31, 2020 7:37 pm

Re: SFTP is extremely slower than smb

Post by tobias »

Hello,
I think this is normal. SSH/SFTP is an Internet protocol for the Internet. It is not meant to copy 1 GB/sec in a LAN.

But make sure you use a recent Syncovery version and use TGPuttyLib and not SecureBlackBox.
KennyLin
Posts: 4
Joined: Fri Apr 11, 2025 7:08 am

Re: SFTP is extremely slower than smb

Post by KennyLin »

Yes, we use latest version and use PuttyLib.

I also had a test on ethernet 1G network.
Tried FileZilla and Syncovery by using SFTP.

FileZilla reached 113MB/s.
Syncovery was still 60MB/s

Seems liks there's a limit number in Syncovery.
Did I miss any setting to improve the speed?
tobias
Posts: 1973
Joined: Tue Mar 31, 2020 7:37 pm

Re: SFTP is extremely slower than smb

Post by tobias »

Hello,
no, there are no settings for TGPuttyLib.

I can reach over 100MB/sec in my network just fine.
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