I have the same issue, com.apple.SwiftUI.AsyncRenderer is crashing on _dispatch_assert_queue_fail. There is no my code in the stack trace except the MyApp.body.getter method. I filed FB24722147 two weeks ago, still no reply. Please help!

I see it too with Xcode 25 beta 5. P.S. I have ~20 local packages and about twice as much remote ones.

Just did the experiment and attached the logs to FB21378487. Hope it helps! [quote='871179022, Developer Tools Engineer, /thread/800067?answerId=871179022#871179022'] Add the following to your ~/.lldbinit: log enable gdb-remote packets --timestamp -f /tmp/log_packets.txt [/quote]

I tried to disable swift-tasks-plugin-enabled as you described, but that barely had noticeable effect (<1s difference). With the debugger attached (and iPhone connected with USB) our app becomes responsive after about 6-7 seconds from start, while this time decreases to less than 1s if I turn off "Debug executable" option in scheme. I collected lldb-rpc-server sample as you described and added it to FB21378487. Hope it would be helpful!

Just checked new Xcode 26.2 with iOS 26.2 and the debug builds startup time indeed improved significantly. We still have ~7 seconds of initial sluggishness (difference between debug executable on/off), but it's way better than it was before! 👍

One year later it's still there. Is an expected behavior after all?

Me too

Answer is here https://stackoverflow.com/a/79342378/2432781

The release notes of Xcode 13.3 beta 2 mentions "code completion" 12 (!) times. Unfortunately I cannot test it yet, since it requires macOS Monterey. Did anybody tried it?

Did you get any reply to your bug report?

Xcode 13.2 beta 2 (13C5081f) - same story. Back to Xcode 12.5.1 again 🙁