Stuck at piping with pv

[kenorb]

I've installed pv to check the speed while pipe'ing, but it doesn't work.

$ seq 1 1000000 | pv -l | wc -l
12.8k 0:00:33 [0.00 /s] [ <=>                                     

and it's stuck.

This is Bash:

$ seq 1 10000000 | pv -l | wc -l
10.0M 0:00:00 [69.1M/s] [ <=>                                                                           ]
10000000