Same issue, can't build or run or really do anything for up to 15 minutes, happens with every branch change, any time I need to run clean, and sometimes just randomly. Makes Xcode almost completely unusable. Come on Apple do better! I am losing hours of time everyday to this crap

We are having this same issue now, today, nice months later! How is this still not resolved?

Having this issue as well

Found the solution to this! run instruments from Xcode > Open Developer Tool > Instruments select your iPhone device from the target menu in the top left of the instruments view tap record to start a session you may have to manually launch the app on your device, but you should see you processes start to appear Note: there seems to be a little delay in rendering the process graphs, which is to be expected