Shameless plug but I think it might be useful to others: https://github.com/robmccoll/bt https://github.com/robmccoll/bt bt (between) counts the time between

Shameless plug but I think it might be useful to others: https://github.com/robmccoll/bt https://github.com/robmccoll/bt bt (between) counts the time between occurrences of the given string on stdin stdin is consumed. output will be the times in floating point seconds, one per line