Xcode 11 debugger is extremely slow - A known problem?

Question

Since I updated to the latest Xcode version 11.0 (11A420a) the debugging is extremely slow and cumbersome.

EDIT: After updating to 11.1 GM (11A1027

Answer 1

I've been dealing with this forever and finally figured it out. It was these lines in my ~/.lldbinit file:

break set -F '-[UIView layoutIfNeeded]' -c '!(BOOL)[NSThread isMainThread]' -L objc
break set -F '-[UIView(AdditionalLayoutSupport) updateConstraintsIfNeeded]' -c '!(BOOL)[NSThread isMainThread]' -L objc

I commented those lines out and now it's almost as fast as without the debugger!