Version: (using KDE 4.3.0) OS: Linux Installed from: Ubuntu Packages When uploading big files to sftp server, the speed is horribly slow, on a 1Gb LAN, it's about 2xxKB/s. It's not right. While using ssh pipe itself, it's full speed -- "tar cf - | ssh server 'tar xf -'". Is something wrong with kde IO subsystem?
kio_sftp has been rewritten using libssh in KDE trunk (KDE 4.4). This should be much faster now. Reopen if you encounter the same problems with KDE 4.4.