ENH/BUG: Code Clean Up, Optimization, Documentation #3482

Job	Run time
Ubuntu GCC	18m 29s
Ubuntu AppImage	19m 5s
macOS Clang	1h 34m 9s
Windows Latest MSVC	1h 16m 32s
Ubuntu Address Sanitizer	1h 7m 26s
Ubuntu Undefined Behavior Sanitizer	4h 36m 17s
	9h 11m 58s

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