In Q2 2025, we observed Internet disruptions around the world resulting from government-directed shutdowns, power outages, cable damage, a cyberattack, and technical problems, as well as several with unexplained causes.
We conduct a randomized controlled trial to understand how early-2025 AI tools affect the productivity of experienced open-source developers working on their own repositories. Surprisingly, we find that when developers use AI tools, they take 19% longer than without—AI makes them slower.