dotnet-random-benchmark

Benchmark of Next(), NextDouble() and NextBytes(byte[]) for XorShift128+, XorShiRo128+ and .NET built-in Random class

Benchmark for Next()

Host Process Environment Information:
BenchmarkDotNet.Core=v0.9.9.0
OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-4710HQ CPU 2.50GHz, ProcessorCount=8
Frequency=2439991 ticks, Resolution=409.8376 ns, Timer=TSC
CLR=MS.NET 4.0.30319.42000, Arch=64-bit RELEASE [RyuJIT]
GC=Concurrent Workstation
JitModules=clrjit-v4.6.1080.0

Type=BenchmarkNext  Mode=Throughput  Platform=X64  
Jit=RyuJit  

Method	Median	StdDev	Scaled	Scaled-SD	Gen 0	Gen 1	Gen 2	Bytes Allocated/Op
WithRandom	8.5704 ns	0.2965 ns	1.00	0.00	-	-	-	0.00
WithXorShift	5.1833 ns	0.2376 ns	0.60	0.03	-	-	-	0.00
WithXorShiRo	6.1830 ns	0.1020 ns	0.72	0.03	-	-	-	0.00

Benchmark for Next(int, int)

Host Process Environment Information:
BenchmarkDotNet.Core=v0.9.9.0
OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-4710HQ CPU 2.50GHz, ProcessorCount=8
Frequency=2439991 ticks, Resolution=409.8376 ns, Timer=TSC
CLR=MS.NET 4.0.30319.42000, Arch=64-bit RELEASE [RyuJIT]
GC=Concurrent Workstation
JitModules=clrjit-v4.6.1080.0

Type=BenchmarkNextMinMax  Mode=Throughput  Platform=X64  
Jit=RyuJit  

Method	Median	StdDev	Scaled	Scaled-SD	Gen 0	Gen 1	Gen 2	Bytes Allocated/Op
WithRandom	24.0499 ns	0.1312 ns	1.00	0.00	-	-	-	0.00
WithXorShift	7.9741 ns	0.1516 ns	0.33	0.01	-	-	-	0.00
WithXorShiRo	10.0711 ns	0.2151 ns	0.42	0.01	-	-	-	0.00

Benchmark for NextDouble()

Host Process Environment Information:
BenchmarkDotNet.Core=v0.9.9.0
OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-4710HQ CPU 2.50GHz, ProcessorCount=8
Frequency=2439991 ticks, Resolution=409.8376 ns, Timer=TSC
CLR=MS.NET 4.0.30319.42000, Arch=64-bit RELEASE [RyuJIT]
GC=Concurrent Workstation
JitModules=clrjit-v4.6.1080.0

Type=BenchmarkNextDouble  Mode=Throughput  Platform=X64  
Jit=RyuJit  

Method	Median	StdDev	Scaled	Scaled-SD	Gen 0	Gen 1	Gen 2	Bytes Allocated/Op
WithRandom	9.7515 ns	0.4409 ns	1.00	0.00	-	-	-	0.00
WithXorShift	6.2083 ns	0.1120 ns	0.63	0.03	-	-	-	0.00
WithXorShiRo	8.0951 ns	0.1520 ns	0.82	0.04	-	-	-	0.00

Benchmark for NextBytes(byte[])

Host Process Environment Information:
BenchmarkDotNet.Core=v0.9.9.0
OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-4710HQ CPU 2.50GHz, ProcessorCount=8
Frequency=2439991 ticks, Resolution=409.8376 ns, Timer=TSC
CLR=MS.NET 4.0.30319.42000, Arch=64-bit RELEASE [RyuJIT]
GC=Concurrent Workstation
JitModules=clrjit-v4.6.1080.0

Type=BenchmarkNextBytes  Mode=Throughput  Platform=X64  
Jit=RyuJit  

Method	Median	StdDev	Scaled	Scaled-SD	Gen 0	Gen 1	Gen 2	Bytes Allocated/Op
WithRandom	8.7393 us	0.1351 us	1.00	0.00	288.00	-	-	531.85
WithXorShift	3.9998 us	0.0163 us	0.46	0.01	2,476.36	-	-	3,954.46
WithXorShiRo	4.6337 us	0.2617 us	0.54	0.03	2,735.87	-	-	4,367.64