xcode is slow every time i edit code

Question

after updating to xcode 10.2 , it became so slow every time i edit any thing even a string, even i if do mistake it doesn't show me the error until it finish building, and when i fix the error or even if i delete the error line it will still show me the error on that line. i always had problem with big projects specially when i edit storyboard but now its slow even when i edit code. anybody had the same experience or knows how to fix it?

Answer 1

Close XCode. Navigate to your project file, right click and select "Show Package Contents", then delete the *.xcworkspace file. Re-open Xcode. Immediate fix for me.

Then don't use Code-folding ...