Xcode 11 Debugger Extremely Slow
Yes, 11.2.1 was the fix provided by Apple
Xcode 12.5 Debugger Slow Since macOS Big Sur 11.3 (Native Swift Project)
This is already discussed in Apple Developer Forum lately. Still not sure what’s going on here, but some people pointed out about dyld being slowed down after macOS Big Sur 11.3. So this has nothing to do with Xcode. All Xcode version in macOS 11.3 (maybe) get affected with this issue. Apple should release macOS update to resolve this issue.
In my case, this issue only appear in Simulator. It is normal in real device. My advice is try to run it in real device and wait for Apple to fix this. But if you only can run your app in Simulator, you should untick/uncheck the debug executable option in Edit Scheme -> Run
Update:
The downside of uncheck the debug executable is you are no longer use debugger. So some feature like breakpoint will not work.
Update:
Some people with macOS Big Sur 11.4 also reporting that this issue still exist.
Update:
This bug has been fixed in macOS Monterey Beta and Xcode 13 Beta.
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