Some stopFetching test followups #325

Job	Run time
xcodebuild (ios, Debug)	9m 4s
swift (debug)	4m 1s
xcodebuild (ios, Release)	8m 57s
swift (release)	3m 56s
xcodebuild (macos, Debug)	5m 1s
xcodebuild (macos, Release)	4m 53s
xcodebuild (tvos, Debug)	5m 20s
xcodebuild (tvos, Release)	5m 20s
xcodebuild (visionos, Debug)	6m 14s
xcodebuild (visionos, Release)	5m 51s
xcodebuild (watchos, Debug)	1m 30s
xcodebuild (watchos, Release)	1m 12s
	1h 1m 19s

Provide feedback