When using sftp command to transfer files, you get this nice live preview:  57%   2GB   1.9MB/s   1.9MB/s 2:56:53 ETAI am interested in the meaning of third and fourth column. What information do they display? At first I thought one is current upload speed, and the other is average, but both numbers change very quickly.
sftp live preview meaning
sftp
This is called progress meter and you can investigate its source code in the OpenSSH:https://github.com/openssh/openssh-portable/blob/master/progressmeter.c#L120It also explains what are the columns you are interested in. The ETA was already explained, the other (1.9MB/s) is recent bandwidth usage, not the average speed.