CSharp_Benchmark

Enum

Method	Mean	Error	StdDev	Gen0	Allocated
EnumToString	15.299 ns	0.2271 ns	0.2124 ns	0.0057	24 B
EnumToString_Swtich	3.890 ns	0.1341 ns	0.1744 ns	-	-

Guid (Span)

Method	Mean	Error	StdDev	Gen0	Allocated
ToGuidFromString	94.61 ns	1.890 ns	2.022 ns	0.0267	112 B
ToGuidFromString_Span	60.12 ns	1.215 ns	1.664 ns	-	-
ToStingFromGuid	110.19 ns	2.224 ns	3.045 ns	0.0439	184 B
ToStingFromGuid_Span	60.48 ns	1.233 ns	1.467 ns	0.0172	72 B

String StartsWith

Method	Mean	Error	StdDev	Median	Gen0	Allocated
StartstWith	37.673 ns	0.7501 ns	0.7367 ns	37.693 ns	-	-
StartsWith_Span	7.541 ns	0.2191 ns	0.6355 ns	7.301 ns	0.0076	32 B
StartsWith_SpanStackAlloc	2.799 ns	0.0584 ns	0.0518 ns	2.813 ns	-	-

Search Collection

• 1 million items with 10,000 lookup values

Method	Mean	Error	StdDev	Allocated
Contains	1,151.70 ms	22.794 ms	58.839 ms	41032 B
HashSet	12.83 ms	0.196 ms	0.241 ms	58751 B
Sort_BinarySearch	32.64 ms	0.247 ms	0.219 ms	40158 B
Sort_BinarySearch_Span	28.79 ms	0.170 ms	0.142 ms	40125 B
Sort_BinarySearch_Span_StackAlloc	28.99 ms	0.118 ms	0.158 ms	29 B

• 500,000 items with 10,000 lookup values

Method	Mean	Error	StdDev	Gen0	Allocated
Contains	573.185 ms	3.1400 ms	2.9372 ms	-	41032 B
HashSet	6.619 ms	0.0473 ms	0.0420 ms	7.8125	58743 B
Sort_BinarySearch	16.249 ms	0.0655 ms	0.0580 ms	-	40125 B
Sort_BinarySearch_Span	14.579 ms	0.0300 ms	0.0251 ms	-	40111 B
Sort_BinarySearch_Span_StackAlloc	14.540 ms	0.0180 ms	0.0151 ms	-	15 B

• 100,000 items with 10,000 lookup values

Method	Mean	Error	StdDev	Gen0	Allocated
Contains	144.576 ms	0.3995 ms	0.3336 ms	-	40330 B
HashSet	1.980 ms	0.0140 ms	0.0131 ms	7.8125	58740 B
Sort_BinarySearch	5.043 ms	0.0082 ms	0.0073 ms	-	40103 B
Sort_BinarySearch_Span	4.607 ms	0.0369 ms	0.0345 ms	-	40103 B
Sort_BinarySearch_Span_StackAlloc	4.653 ms	0.0726 ms	0.0679 ms	-	7 B

• 20 items with 10 lookup values

Method	Mean	Error	StdDev	Gen0	Allocated
Contains	145.7 ns	2.91 ns	4.70 ns	0.0215	136 B
HashSet	280.6 ns	1.05 ns	0.88 ns	0.0381	240 B
Sort_BinarySearch	213.4 ns	3.02 ns	2.83 ns	0.0215	136 B
Sort_BinarySearch_Span	177.5 ns	0.88 ns	0.78 ns	0.0215	136 B
Sort_BinarySearch_Span_StackAlloc	125.6 ns	0.67 ns	0.62 ns	-	-

• 1,000 items with 100,000 lookup values

Method	Mean	Error	StdDev	Gen0	Gen1	Gen2	Allocated
Contains	744.5 us	28.27 us	78.81 us	124.0234	124.0234	124.0234	400180 B
HashSet	1,940.4 us	38.29 us	98.14 us	119.1406	89.8438	83.9844	538750 B
Sort_BinarySearch	5,855.5 us	61.08 us	54.14 us	117.1875	117.1875	117.1875	400182 B
Sort_BinarySearch_Span	5,949.9 us	116.14 us	162.82 us	117.1875	117.1875	117.1875	400182 B
Sort_BinarySearch_Span_StackAlloc	5,514.1 us	103.96 us	97.24 us	-	-	-	7 B

• Mean : Arithmetic mean of all measurements
• Error : Half of 99.9% confidence interval
• StdDev : Standard deviation of all measurements
• Median : Value separating the higher half of all measurements (50th percentile)
• Allocated : Allocated memory per single operation (managed only, inclusive, 1KB = 1024B)
• 1 ms : 1 Millisecond (0.001 sec)
• 1 us : 1 Microsecond (0.000001 sec)
• 1 ns : 1 Nanosecond