The sysutils/pv port
pv-1.8.0 – monitor the progress of data through a pipeline (cvsweb github mirror)
Description
Pipe Viewer (pv) is a terminal-based tool for monitoring the progress of data through a pipeline. It can be inserted into any normal pipeline between two processes to give a visual indication of how quickly data is passing through, how long it has taken, how near to completion it is and estimate of how long it will be until completion.WWW: https://www.ivarch.com/programs/pv.shtml
Maintainer
The OpenBSD ports mailing-list