$ tar -cf - . | pv -cN tar -s $(du -sb | grep -o '[0-9]*') | gzip | pv -cN gzip > out.tgz
tar: 97.1MB 0:00:08 [12.3MB/s] [>......................] 0% ETA 1:50:26
gzip: 13.1MB 0:00:08 [1.6MB/s] [....<=>................]