Hello, I updated to Xcode 9 on my MacBook Pro 2015 (15") and the result is just awful. My computer's ventilator is all the time turned on and it is lagging even if I connect a simple UI element with my code. I don't know what can cause this problem but before the update my computer turned on the cooling system only on very heavy tasks. Now I just open Xcode and it starts. Do anybody else have the same problem? What would you recommend to do?
Xcode 9 overheating problem
I have this problem too. It's bad. Activity Monitor showed high CPU use, but no process in the list was showing up at the top with high CPU percentage (which I would normally see). But, if I run `top` from command line I can see many `swift` processes chewing CPU. Their PIDs keep changing, which suggests they are dying and being restarted in some kind of loop.
Haven't found a solution yet.
For me the Activity Monitor is showing that the Interface builder is consuming around 65% CPU when I don't modify anything and it jumps up to 99,5% when I try to modify for example a font size or any other attribute. The Xcode process is just running normally. So I would say it is happening because of the Interface builder in my case. If I run 'top' from command line than I don't have any swift processes. On my other MacBook Pro (13") the same version of Xcode is running without any problem.
No solution yet either. Maybe an update will fix this issue.
This happened to me too when I renamed some .swift files but didn't rename the classes in those files to match. I was also using Interface builder while I was doing this. Renaming the classes to match, cleaning the project, restarting xcode, and building everything seems to have fixed the problem.
it's not a joke. you should buy A/C. I am also having same problem (macbook pro 2019 16")