Working on XCode 13.1, Monterey - confirming saw the issue where SourceKitService & swift-frontend memory usage would each explode to around 40GB.
I saw this issue fairly quickly - within minutes - of using GeometryReader in a project. After going through above thread, I decide to remove the code using GeometryReader, force quit above services, closed and re-opened XCode.
So far, I do not see any spike in memory in the above services. SourceKitService is at about 70MB, XCode at about 1.11 GB. Launched app on device and, so far, XCode & system are stable with above usage.
Would love to know what the issue is here