Compiletime reduction

[feliwir]

Run some clang compile time analysis and try to reduce some of the hotspots found (only the low hanging fruits). There are some other things i'll look out for and try to reduce. The are the principles i applied:

• Use forward declaration where applicable
• Don't include large headers into other headers if not required
• Remove unused headers

These are the numbers i get for a full compile using ninja on an AMD Ryzen 7 1800X		Before	After
read	2m41,982s	2m24,437s
user	36m57,585s	34m13,440s
sys	1m25,232s	1m18,250s

If someone is interested in a good read about the tools i've used: https://aras-p.info/blog/2019/01/16/time-trace-timeline-flame-chart-profiler-for-Clang/ https://aras-p.info/blog/2019/09/28/Clang-Build-Analyzer/

[codectile]

Unity builds might help as well.

[feliwir]

Unity builds might help as well.

They usually decrease incremental build time by a lot, which is not desirable in my opinion

[autious]

I believe this merge broke the build for win64

D:\buildbot\wolfire-dev\overgrowth-build-win64\build\Source\Internal\datemodified.cpp(76): error C3861: 'ctime_s': identifier not found [D:\buildbot\wolfire-dev\overgrowth-build-win64\build\Build\OvergrowthWorker.vcxproj]```

[feliwir]

@autious which VS version are you using? Our CI runner uses VS2022, which defaults to win64 and that one compiled succesfully

[autious]

I believe it is vs2017

[feliwir]

@autious is it fixed by including <time.h>?