From Basic Instructions:

I knew a comedian who had a spreadsheet on which he had every line from his act intended to get any sort of reaction from an audience listed in the left hand column. He’d tape record every show, then spend part of the next day listening to the entire act, pausing the recording after every reaction and scoring that reaction on the spreadsheet on a scale from one to ten. If a line fell below a certain percentage, it was cut from the act.

Ric and I both agreed that it was an insane plan, which would rob our friend’s act of its soul. I should point out that our friend is still a comedian. Ric and I are not.