Improved String to Decimal parsing #4800

Job	Run time
Ubuntu2004	1h 21m 31s
Mac	33m 46s
Ubuntu2004-nomoco	49m 15s
Windows	1h 22m 52s
Windows2022	1h 19m 34s
Windows2022 [target]	0s
Mac [target]	0s
Windows2022-gui	0s
Style	10s
Performance Analysis (Mac)	0s
Performance Analysis (Windows)	0s
	5h 27m 8s

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