How Gametape can prove a tool saved you time
Your log is a list of the actions you took, in order, each with the time it cost.
A tool saves you time when it takes a run of lines in that log and replaces them with one. Twenty lines of copying numbers between two windows become a single line.
So when your agent proposes a product, it can show you what would change in your own log: which lines disappear, and which line takes their place. The more a product compresses the log, the more effective it is.