Test_BufferPools

Summary

• Visual Studio 2019 (Version 16.8.4)
• .NET 5.0 (Console application)
• Enable nullable option
• Use BenchmarkDotNet

Benchmark methods

• ArrayPool_Type
  • Use ArrayPool<T>.Shared.Rent and ArrayPool<T>.Shared.Return.
• ArrayPoolScope_Type
  • Use ArrayPoolScope<T> (ArrayPool<T> wrapper struct) in using statement.
• MemoryPool_Type
  • Use MemoryPool<T>.Shared.Rent in using statement.

Benchmark results (on ruche7's PC)

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.746 (2004/?/20H1)
Intel Core i7-5820K CPU 3.30GHz (Broadwell), 1 CPU, 12 logical and 6 physical cores
.NET Core SDK=5.0.102
  [Host]     : .NET Core 5.0.2 (CoreCLR 5.0.220.61120, CoreFX 5.0.220.61120), X64 RyuJIT
  DefaultJob : .NET Core 5.0.2 (CoreCLR 5.0.220.61120, CoreFX 5.0.220.61120), X64 RyuJIT

Length column is minimum array length.

Method	Length	Mean	Error	StdDev	Median	Ratio	RatioSD
ArrayPool_Byte	0	9.603 ns	0.2242 ns	0.2303 ns	9.474 ns	1.00	0.00
ArrayPoolScope_Byte	0	12.568 ns	0.2809 ns	0.3652 ns	12.485 ns	1.30	0.05
MemoryPool_Byte	0	22.392 ns	0.2802 ns	0.2339 ns	22.344 ns	2.33	0.07
ArrayPool_Char	0	9.339 ns	0.2128 ns	0.2185 ns	9.327 ns	1.00	0.00
ArrayPoolScope_Char	0	12.390 ns	0.2759 ns	0.3177 ns	12.358 ns	1.32	0.03
MemoryPool_Char	0	22.563 ns	0.3506 ns	0.2737 ns	22.506 ns	2.43	0.07
ArrayPool_Int	0	9.799 ns	0.2257 ns	0.2509 ns	9.721 ns	1.00	0.00
ArrayPoolScope_Int	0	13.188 ns	0.1397 ns	0.1166 ns	13.142 ns	1.35	0.03
MemoryPool_Int	0	22.679 ns	0.4816 ns	0.5734 ns	22.571 ns	2.31	0.08
ArrayPool_Object	0	40.091 ns	0.8362 ns	1.1163 ns	39.372 ns	1.00	0.00
ArrayPoolScope_Object	0	42.573 ns	0.8636 ns	1.1230 ns	42.173 ns	1.06	0.04
MemoryPool_Object	0	69.392 ns	1.3652 ns	1.2770 ns	68.845 ns	1.74	0.05
ArrayPool_Byte	10	32.616 ns	0.6576 ns	1.0618 ns	32.648 ns	1.00	0.00
ArrayPoolScope_Byte	10	33.908 ns	0.7076 ns	1.1223 ns	33.291 ns	1.04	0.05
MemoryPool_Byte	10	41.614 ns	0.8425 ns	0.9014 ns	41.051 ns	1.28	0.05
ArrayPool_Char	10	30.096 ns	0.6145 ns	0.5447 ns	29.826 ns	1.00	0.00
ArrayPoolScope_Char	10	32.573 ns	0.6612 ns	0.9692 ns	31.957 ns	1.08	0.04
MemoryPool_Char	10	40.318 ns	0.1289 ns	0.1006 ns	40.265 ns	1.34	0.03
ArrayPool_Int	10	29.709 ns	0.6182 ns	1.0328 ns	29.112 ns	1.00	0.00
ArrayPoolScope_Int	10	34.747 ns	0.5889 ns	0.4598 ns	34.743 ns	1.17	0.04
MemoryPool_Int	10	39.068 ns	0.8006 ns	1.1736 ns	39.005 ns	1.31	0.07
ArrayPool_Object	10	57.574 ns	1.1760 ns	1.2077 ns	56.621 ns	1.00	0.00
ArrayPoolScope_Object	10	61.011 ns	1.2510 ns	1.6267 ns	60.809 ns	1.06	0.04
MemoryPool_Object	10	87.904 ns	1.7555 ns	2.4029 ns	86.647 ns	1.53	0.06
ArrayPool_Byte	1000	30.267 ns	0.6427 ns	0.9619 ns	29.716 ns	1.00	0.00
ArrayPoolScope_Byte	1000	31.100 ns	0.5145 ns	0.6507 ns	30.839 ns	1.02	0.02
MemoryPool_Byte	1000	39.077 ns	0.5523 ns	0.4612 ns	38.897 ns	1.27	0.05
ArrayPool_Char	1000	28.595 ns	0.2529 ns	0.1974 ns	28.577 ns	1.00	0.00
ArrayPoolScope_Char	1000	31.874 ns	0.6706 ns	1.0637 ns	31.295 ns	1.14	0.04
MemoryPool_Char	1000	40.375 ns	0.5514 ns	0.5157 ns	40.111 ns	1.41	0.02
ArrayPool_Int	1000	37.328 ns	0.7755 ns	1.2957 ns	36.847 ns	1.00	0.00
ArrayPoolScope_Int	1000	31.608 ns	0.6680 ns	1.0201 ns	31.053 ns	0.84	0.04
MemoryPool_Int	1000	38.742 ns	0.7741 ns	0.6863 ns	38.387 ns	1.04	0.04
ArrayPool_Object	1000	52.707 ns	1.0543 ns	0.9862 ns	52.080 ns	1.00	0.00
ArrayPoolScope_Object	1000	55.582 ns	0.0760 ns	0.0635 ns	55.594 ns	1.05	0.02
MemoryPool_Object	1000	85.910 ns	1.7595 ns	2.3489 ns	85.808 ns	1.64	0.06
ArrayPool_Byte	1000000	30.197 ns	0.6221 ns	1.0896 ns	29.616 ns	1.00	0.00
ArrayPoolScope_Byte	1000000	31.085 ns	0.1332 ns	0.1040 ns	31.086 ns	1.03	0.03
MemoryPool_Byte	1000000	44.701 ns	0.7641 ns	0.6381 ns	44.372 ns	1.49	0.05
ArrayPool_Char	1000000	30.531 ns	0.6138 ns	0.8803 ns	30.114 ns	1.00	0.00
ArrayPoolScope_Char	1000000	31.889 ns	0.2061 ns	0.1721 ns	31.936 ns	1.04	0.04
MemoryPool_Char	1000000	41.762 ns	0.7557 ns	0.6699 ns	41.434 ns	1.36	0.05
ArrayPool_Int	1000000	29.935 ns	0.5880 ns	0.5212 ns	29.694 ns	1.00	0.00
ArrayPoolScope_Int	1000000	32.004 ns	0.1940 ns	0.1515 ns	31.982 ns	1.07	0.02
MemoryPool_Int	1000000	45.195 ns	0.9122 ns	1.1536 ns	44.820 ns	1.52	0.05
ArrayPool_Object	1000000	53.849 ns	0.1147 ns	0.1017 ns	53.810 ns	1.00	0.00
ArrayPoolScope_Object	1000000	54.830 ns	0.2777 ns	0.2319 ns	54.820 ns	1.02	0.01
MemoryPool_Object	1000000	93.586 ns	0.7573 ns	0.6714 ns	93.212 ns	1.74	0.01