[Utf8Array] GetLengthを最適化

[finphie]

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19043.1288 (21H1/May2021Update)
AMD Ryzen 7 5800U with Radeon Graphics, 1 CPU, 16 logical and 8 physical cores
.NET SDK=6.0.100-rc.2.21505.57
  [Host]             : .NET 6.0.0 (6.0.21.48005), X64 RyuJIT
  DisableHWIntrinsic : .NET 6.0.0 (6.0.21.48005), X64 RyuJIT
  Runtime=.NET 6.0   : .NET 6.0.0 (6.0.21.48005), X64 RyuJIT

Runtime=.NET 6.0  

Method	Job	EnvironmentVariables	Value	Count	Mean	Error	StdDev	Ratio	RatioSD	Allocated
GetLength_Loop	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	abcd	1	1.740 ns	0.0107 ns	0.0094 ns	0.74	0.00	-
GetLength_Table	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	abcd	1	2.420 ns	0.0109 ns	0.0102 ns	1.03	0.00	-
GetLength_Long	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	abcd	1	2.339 ns	0.0075 ns	0.0070 ns	1.00	0.00	-
GetLength_Loop	Runtime=.NET 6.0	Empty	abcd	1	1.728 ns	0.0084 ns	0.0070 ns	0.89	0.00	-
GetLength_Table	Runtime=.NET 6.0	Empty	abcd	1	2.421 ns	0.0082 ns	0.0077 ns	1.24	0.01	-
GetLength_Long	Runtime=.NET 6.0	Empty	abcd	1	1.947 ns	0.0079 ns	0.0074 ns	1.00	0.00	-
GetLength_Loop	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	abcd	1000	1,840.116 ns	4.2662 ns	3.9906 ns	1.98	0.01	-
GetLength_Table	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	abcd	1000	8,133.821 ns	5.4448 ns	5.0930 ns	8.77	0.03	-
GetLength_Long	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	abcd	1000	927.885 ns	3.3249 ns	3.1101 ns	1.00	0.00	-
GetLength_Loop	Runtime=.NET 6.0	Empty	abcd	1000	1,839.473 ns	3.1285 ns	2.9264 ns	5.26	0.01	-
GetLength_Table	Runtime=.NET 6.0	Empty	abcd	1000	8,125.733 ns	0.7248 ns	0.6426 ns	23.24	0.05	-
GetLength_Long	Runtime=.NET 6.0	Empty	abcd	1000	349.620 ns	0.7187 ns	0.6723 ns	1.00	0.00	-
GetLength_Loop	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あaαβaあααいうazzαああαabc	1	17.192 ns	0.0455 ns	0.0380 ns	1.55	0.00	-
GetLength_Table	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あaαβaあααいうazzαああαabc	1	37.564 ns	0.0516 ns	0.0457 ns	3.39	0.01	-
GetLength_Long	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あaαβaあααいうazzαああαabc	1	11.068 ns	0.0216 ns	0.0202 ns	1.00	0.00	-
GetLength_Loop	Runtime=.NET 6.0	Empty	あaαβaあααいうazzαああαabc	1	21.603 ns	0.0518 ns	0.0485 ns	3.70	0.01	-
GetLength_Table	Runtime=.NET 6.0	Empty	あaαβaあααいうazzαああαabc	1	37.590 ns	0.0282 ns	0.0250 ns	6.45	0.02	-
GetLength_Long	Runtime=.NET 6.0	Empty	あaαβaあααいうazzαああαabc	1	5.831 ns	0.0192 ns	0.0161 ns	1.00	0.00	-
GetLength_Loop	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あaαβaあααいうazzαああαabc	1000	21,654.369 ns	25.0355 ns	22.1933 ns	2.46	0.00	-
GetLength_Table	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あaαβaあααいうazzαああαabc	1000	40,656.742 ns	36.2314 ns	33.8909 ns	4.62	0.01	-
GetLength_Long	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あaαβaあααいうazzαああαabc	1000	8,810.101 ns	17.0358 ns	15.1018 ns	1.00	0.00	-
GetLength_Loop	Runtime=.NET 6.0	Empty	あaαβaあααいうazzαああαabc	1000	17,517.835 ns	33.8446 ns	31.6583 ns	5.32	0.01	-
GetLength_Table	Runtime=.NET 6.0	Empty	あaαβaあααいうazzαああαabc	1000	40,637.298 ns	31.3999 ns	29.3715 ns	12.34	0.02	-
GetLength_Long	Runtime=.NET 6.0	Empty	あaαβaあααいうazzαああαabc	1000	3,292.158 ns	5.3376 ns	4.9928 ns	1.00	0.00	-
GetLength_Loop	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あいうえお	1	8.916 ns	0.0124 ns	0.0110 ns	1.74	0.00	-
GetLength_Table	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あいうえお	1	2.867 ns	0.0203 ns	0.0180 ns	0.56	0.00	-
GetLength_Long	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あいうえお	1	5.129 ns	0.0141 ns	0.0132 ns	1.00	0.00	-
GetLength_Loop	Runtime=.NET 6.0	Empty	あいうえお	1	8.919 ns	0.0115 ns	0.0108 ns	2.32	0.01	-
GetLength_Table	Runtime=.NET 6.0	Empty	あいうえお	1	2.856 ns	0.0155 ns	0.0137 ns	0.74	0.00	-
GetLength_Long	Runtime=.NET 6.0	Empty	あいうえお	1	3.841 ns	0.0118 ns	0.0111 ns	1.00	0.00	-
GetLength_Loop	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あいうえお	1000	9,213.676 ns	17.3948 ns	16.2711 ns	2.37	0.00	-
GetLength_Table	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あいうえお	1000	10,155.889 ns	1.4181 ns	1.2571 ns	2.61	0.00	-
GetLength_Long	DisableHWIntrinsic	COMPlus_EnableHWIntrinsic=0	あいうえお	1000	3,890.028 ns	4.0534 ns	3.7915 ns	1.00	0.00	-
GetLength_Loop	Runtime=.NET 6.0	Empty	あいうえお	1000	6,920.692 ns	9.5854 ns	8.9662 ns	5.34	0.01	-
GetLength_Table	Runtime=.NET 6.0	Empty	あいうえお	1000	10,163.939 ns	8.1335 ns	7.6081 ns	7.84	0.02	-
GetLength_Long	Runtime=.NET 6.0	Empty	あいうえお	1000	1,296.935 ns	2.9480 ns	2.7575 ns	1.00	0.00	-