Hi Marcus, double wrote: > double schrieb: >> With a buffersize 1024 it works. > > Libssh2 is slow with a 1024 byte buffer. If I transfer > big files (~10GB) from Europe to USA, I hardly see > more than 100 kbit/sec. Using "sftp" the transfer-rate > is about 2 Mbit/sec.
Yes, there is certainly opportunity for performance improvement in libssh2. Please feel free to dig into the windowing and buffer code. Some time ago I have also posted links to discussion on the openssh mailing list about SFTP performance. Should also look into the hpn patch, and the research behind that. //Peter _______________________________________________ libssh2-devel http://cool.haxx.se/cgi-bin/mailman/listinfo/libssh2-devel
