Today I was using rsync over a slow internet connection to transfer a video file - uncompressed avi, 60 seconds duration, 360MB in size. Basically it contained 1500 frames of the same image, hence it was highly compressible.
Top upload speed on my internet connection is 130KB/s.
I need to transfer some files via rsync and can´t tar them before. So I thought maybe there is a mode which checks the folders content and if it is thousand of small files inside compress that folder for the transfer. However I couldn´t find something like that in the man (http://www.manpagez.com/man/1/rsync/). Is it possible and I didn´t find it or would I have to do this before I use rsync?