"command | timestamping regexp [regexp] ..."
Act as a tee command except that when the given regexps are detected in a line, it show a timestamp and the difference with the previous timestamp mark or with the start of the execution.
It can be used to obtain the time consumed by each step of a command line tool that show it progress at the stdout.
EOF not defected ok using go version prior to 1.5
(Bugfix at 1.5)[https://github.com/golang/go/commit/fd5b8aa7999e6710e14f4798dcb9e9387247511d]