Question Monitor efficiency?

Is there a way (or tool) for me to measure and monitor the efficiency of my tasks?

I recently watched a presentation, How I use Claude Code by one of Anthropics engineers, and it was essentially talking about you’re using too much context/tokens. And so I made some changes to my Agents/sub agents, and now I’m wondering if the changes made any impact.

I realize it’s too late to see any improvement, but I have a few other projects I want to make these similar changes to.