"-loadingTime" cmdline param enhancement #116

Job	Run time
build_windows_cmake (Release, x64, amd64)	5m 29s
build_windows_msys2 (Release, x86_64)	5m 22s
build_windows_msys2 (Release, i686)	5m 4s
build_windows (Release, x64)	5m 8s
build_windows_msys2 (Debug, x86_64)	5m 50s
build_windows (Release, Win32)	3m 29s
build_windows_msys2 (Debug, i686)	4m 25s
build_windows (Release, ARM64)	4m 37s
build_windows (Debug, x64)	6m 49s
build_windows (Debug, Win32)	4m 0s
build_windows (Debug, ARM64)	3m 31s
	53m 44s

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