This is in current master (with CEF 3.1547.1337) 1. Open Activity Monitor 2. Launch Brackets pointing to the brackets repo 3. Open brackets.js 4. Wait for the process to go down to <1% CPU usage 5. Using the touchpad, throw scroll up and down 6. Compare with the same steps in Sprint 27 Result: In the latest version, scrolling is noticeably worse than in Sprint 27 even on a short file--it's very jerky. If you look at Activity Monitor, you'll see that with the current CEF, there are two Brackets Helper processes, and while scrolling, one of them averages 90-100% CPU usage and the other averages about 20%. In Sprint 27, there was only one Brackets Helper process, and during the same kind of scrolling it averaged about 50% CPU usage.