GetActiveStopwatch & HasUserStopwatch is a hot piece of code that is
repeatedly called and on examination of the cpu profile for TestGit it
represents 0.44 seconds of CPU time. This PR reduces this time to 80ms.
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Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: delvh <leon@kske.dev>