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Looking for better dynamic getter and setter solutions

2020-11-09 10:49:00 【Newbe36524】

Reflection acquisition PropertyInfo You can read or write the attribute values of an object , But this performance is not good . therefore , We need a faster solution .

Solutions that

That is to compile an expression  Action<TObj,TValue>  As Setter, Compile one  Func<TObj,TValue>  As Getter.

The compiled delegates are then stored in a static field of a generic class , When you need to use it, you can find it from here .

Knowledge points

  1. Create a delegate using an expression
  2. The static fields of a generic class are independent of each closed type , So it's very convenient to store type related content

Implementation code

Due to the mixed use of code Switch As a dirty word for a dictionary , So the code is long , I'm not going to list , Just give links ：

The benchmark 

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.19041.572 (2004/?/20H1)
Intel Xeon CPU E5-2678 v3 2.50GHz, 1 CPU, 24 logical and 12 physical cores
.NET Core SDK=5.0.100-rc.2.20479.15
 [Host] : .NET Core 2.1.23 (CoreCLR 4.6.29321.03, CoreFX 4.6.29321.01), X64 RyuJIT
 net461 : .NET Framework 4.8 (4.8.4250.0), X64 RyuJIT
 net48 : .NET Framework 4.8 (4.8.4250.0), X64 RyuJIT
 netcoreapp21 : .NET Core 2.1.23 (CoreCLR 4.6.29321.03, CoreFX 4.6.29321.01), X64 RyuJIT
 netcoreapp31 : .NET Core 3.1.9 (CoreCLR 4.700.20.47201, CoreFX 4.700.20.47203), X64 RyuJIT
 netcoreapp5 : .NET Core 5.0.0 (CoreCLR 5.0.20.47505, CoreFX 5.0.20.47505), X64 RyuJIT

Conclusion

  1. Using delegation is obviously better than using PropertyInfo Be quick , This program can .
  2. Framework Really pulling the hip ,Net 5 It's just too strong .
  3. If the attribute is explicit , It is recommended to keep the delegation extracted from the dictionary in its own context , This can significantly save the cost of searching .

Chart

From left to right are ： Read properties directly 、 Cache delegation 、 Do not cache delegates and use PropertyInfo.

Getter
Setter

data

Getter

Method Job Runtime Mean Error StdDev Median Ratio RatioSD Rank
DirectlyString net461 .NET 4.6.1 0.1636 ns 0.0822 ns 0.1126 ns 0.1472 ns ? ? 2
DirectlyInt net461 .NET 4.6.1 0.0318 ns 0.0348 ns 0.0342 ns 0.0217 ns ? ? 1
ReflectString net461 .NET 4.6.1 145.8375 ns 2.2790 ns 2.1317 ns 145.6522 ns ? ? 7
ReflectInt net461 .NET 4.6.1 172.5066 ns 1.3206 ns 1.1028 ns 172.6804 ns ? ? 8
GetterString net461 .NET 4.6.1 31.4379 ns 0.6017 ns 0.5334 ns 31.6316 ns ? ? 4
GetterInt net461 .NET 4.6.1 33.0642 ns 0.4940 ns 0.4380 ns 33.0557 ns ? ? 5
GetterObject net461 .NET 4.6.1 33.9174 ns 0.5587 ns 0.5226 ns 33.7326 ns ? ? 6
GetterCached net461 .NET 4.6.1 7.5878 ns 0.1223 ns 0.1144 ns 7.5765 ns ? ? 3
                   
DirectlyString net48 .NET 4.8 0.0181 ns 0.0353 ns 0.0313 ns 0.0043 ns ? ? 1
DirectlyInt net48 .NET 4.8 0.0050 ns 0.0089 ns 0.0079 ns 0.0000 ns ? ? 1
ReflectString net48 .NET 4.8 143.8313 ns 2.2501 ns 2.1047 ns 143.5568 ns ? ? 5
ReflectInt net48 .NET 4.8 172.1714 ns 1.9819 ns 1.7569 ns 172.3142 ns ? ? 6
GetterString net48 .NET 4.8 31.5887 ns 0.6310 ns 0.5902 ns 31.5385 ns ? ? 3
GetterInt net48 .NET 4.8 32.7140 ns 0.3992 ns 0.3734 ns 32.7343 ns ? ? 4
GetterObject net48 .NET 4.8 33.3063 ns 0.2069 ns 0.1834 ns 33.3053 ns ? ? 4
GetterCached net48 .NET 4.8 7.5540 ns 0.2201 ns 0.1951 ns 7.5069 ns ? ? 2
                   
DirectlyString netcoreapp21 .NET Core 2.1 0.0000 ns 0.0000 ns 0.0000 ns 0.0000 ns ? ? 1
DirectlyInt netcoreapp21 .NET Core 2.1 0.0193 ns 0.0111 ns 0.0104 ns 0.0177 ns ? ? 2
ReflectString netcoreapp21 .NET Core 2.1 110.4180 ns 2.2159 ns 1.8503 ns 110.8038 ns ? ? 7
ReflectInt netcoreapp21 .NET Core 2.1 138.9612 ns 0.9694 ns 0.8594 ns 138.8217 ns ? ? 8
GetterString netcoreapp21 .NET Core 2.1 16.8958 ns 0.2384 ns 0.2230 ns 16.8103 ns ? ? 4
GetterInt netcoreapp21 .NET Core 2.1 19.4407 ns 0.2041 ns 0.1809 ns 19.4539 ns ? ? 6
GetterObject netcoreapp21 .NET Core 2.1 18.6922 ns 0.2700 ns 0.2255 ns 18.6582 ns ? ? 5
GetterCached netcoreapp21 .NET Core 2.1 0.9299 ns 0.0457 ns 0.0427 ns 0.9308 ns ? ? 3
                   
DirectlyString netcoreapp31 .NET Core 3.1 0.0000 ns 0.0000 ns 0.0000 ns 0.0000 ns ? ? 1
DirectlyInt netcoreapp31 .NET Core 3.1 0.0693 ns 0.0102 ns 0.0091 ns 0.0709 ns ? ? 2
ReflectString netcoreapp31 .NET Core 3.1 98.6735 ns 0.8335 ns 0.7389 ns 98.5319 ns ? ? 7
ReflectInt netcoreapp31 .NET Core 3.1 130.6941 ns 0.9332 ns 0.8730 ns 130.5376 ns ? ? 8
GetterString netcoreapp31 .NET Core 3.1 14.8915 ns 0.2025 ns 0.1795 ns 14.8911 ns ? ? 4
GetterInt netcoreapp31 .NET Core 3.1 16.2874 ns 0.0789 ns 0.0700 ns 16.2753 ns ? ? 5
GetterObject netcoreapp31 .NET Core 3.1 17.6202 ns 0.1130 ns 0.1057 ns 17.6092 ns ? ? 6
GetterCached netcoreapp31 .NET Core 3.1 0.6351 ns 0.0244 ns 0.0217 ns 0.6393 ns ? ? 3
                   
DirectlyString netcoreapp5 .NET Core 5.0 0.5098 ns 0.0328 ns 0.0291 ns 0.5131 ns 1.000 0.00 2
DirectlyInt netcoreapp5 .NET Core 5.0 0.0000 ns 0.0000 ns 0.0000 ns 0.0000 ns 0.000 0.00 1
ReflectString netcoreapp5 .NET Core 5.0 88.8937 ns 0.9697 ns 0.8596 ns 88.7457 ns 174.838 9.26 7
ReflectInt netcoreapp5 .NET Core 5.0 123.4464 ns 1.0582 ns 0.9898 ns 123.3193 ns 242.996 14.00 8
GetterString netcoreapp5 .NET Core 5.0 7.6628 ns 0.0931 ns 0.0777 ns 7.6703 ns 15.031 0.95 5
GetterInt netcoreapp5 .NET Core 5.0 6.6645 ns 0.0825 ns 0.0772 ns 6.6497 ns 13.085 0.69 4
GetterObject netcoreapp5 .NET Core 5.0 8.3090 ns 0.1685 ns 0.1576 ns 8.2865 ns 16.344 0.83 6
GetterCached netcoreapp5 .NET Core 5.0 0.9791 ns 0.0293 ns 0.0245 ns 0.9764 ns 1.920 0.13 3

Setter

Method Job Runtime Mean Error StdDev Median Ratio RatioSD Rank
DirectlyString net461 .NET 4.6.1 2.0161 ns 0.0300 ns 0.0266 ns 2.0045 ns 1.000 0.00 2
DirectlyInt net461 .NET 4.6.1 0.0076 ns 0.0094 ns 0.0083 ns 0.0081 ns 0.004 0.00 1
ReflectString net461 .NET 4.6.1 237.5006 ns 4.5706 ns 4.4890 ns 236.5912 ns 117.871 3.40 5
ReflectInt net461 .NET 4.6.1 249.3627 ns 2.1717 ns 2.0314 ns 249.0283 ns 123.681 1.94 6
GetterString net461 .NET 4.6.1 32.8621 ns 0.2855 ns 0.2229 ns 32.9189 ns 16.335 0.22 4
GetterInt net461 .NET 4.6.1 33.6103 ns 0.4245 ns 0.3544 ns 33.5499 ns 16.695 0.26 4
GetterObject net461 .NET 4.6.1 33.2561 ns 0.2966 ns 0.2629 ns 33.1795 ns 16.497 0.17 4
GetterCached net461 .NET 4.6.1 9.1805 ns 0.0761 ns 0.0674 ns 9.1802 ns 4.554 0.08 3
                   
DirectlyString net48 .NET 4.8 1.9272 ns 0.0298 ns 0.0264 ns 1.9245 ns 1.000 0.00 2
DirectlyInt net48 .NET 4.8 0.0000 ns 0.0000 ns 0.0000 ns 0.0000 ns 0.000 0.00 1
ReflectString net48 .NET 4.8 237.7686 ns 4.6597 ns 5.3661 ns 235.8445 ns 123.908 3.57 5
ReflectInt net48 .NET 4.8 249.6291 ns 4.5333 ns 4.2404 ns 249.5459 ns 129.689 3.13 6
GetterString net48 .NET 4.8 32.2366 ns 0.1941 ns 0.1721 ns 32.1780 ns 16.731 0.29 4
GetterInt net48 .NET 4.8 32.0081 ns 0.1488 ns 0.1162 ns 32.0270 ns 16.572 0.23 4
GetterObject net48 .NET 4.8 32.6413 ns 0.1417 ns 0.1183 ns 32.6260 ns 16.907 0.24 4
GetterCached net48 .NET 4.8 9.2589 ns 0.0928 ns 0.0868 ns 9.2564 ns 4.799 0.07 3
                   
DirectlyString netcoreapp21 .NET Core 2.1 2.4107 ns 0.0507 ns 0.0475 ns 2.3936 ns 1.000 0.00 2
DirectlyInt netcoreapp21 .NET Core 2.1 0.0007 ns 0.0028 ns 0.0025 ns 0.0000 ns 0.000 0.00 1
ReflectString netcoreapp21 .NET Core 2.1 203.6637 ns 3.6109 ns 3.3777 ns 203.4793 ns 84.517 2.31 7
ReflectInt netcoreapp21 .NET Core 2.1 213.8619 ns 2.1882 ns 1.9398 ns 213.7367 ns 88.757 1.71 8
GetterString netcoreapp21 .NET Core 2.1 19.5240 ns 0.0811 ns 0.0758 ns 19.5149 ns 8.102 0.15 5
GetterInt netcoreapp21 .NET Core 2.1 18.8794 ns 0.1193 ns 0.1058 ns 18.8837 ns 7.836 0.18 4
GetterObject netcoreapp21 .NET Core 2.1 20.6765 ns 0.2709 ns 0.2115 ns 20.6419 ns 8.584 0.14 6
GetterCached netcoreapp21 .NET Core 2.1 2.7606 ns 0.0613 ns 0.0512 ns 2.7590 ns 1.148 0.02 3
                   
DirectlyString netcoreapp31 .NET Core 3.1 2.2625 ns 0.0647 ns 0.0605 ns 2.2555 ns 1.000 0.00 2
DirectlyInt netcoreapp31 .NET Core 3.1 0.0072 ns 0.0165 ns 0.0146 ns 0.0000 ns 0.003 0.01 1
ReflectString netcoreapp31 .NET Core 3.1 182.7306 ns 3.3249 ns 3.1101 ns 182.3062 ns 80.804 1.99 7
ReflectInt netcoreapp31 .NET Core 3.1 192.2510 ns 2.3691 ns 2.1002 ns 191.4821 ns 85.061 2.88 8
GetterString netcoreapp31 .NET Core 3.1 16.9918 ns 0.2115 ns 0.1979 ns 16.9651 ns 7.516 0.25 5
GetterInt netcoreapp31 .NET Core 3.1 16.1168 ns 0.3558 ns 0.3654 ns 15.9822 ns 7.138 0.19 4
GetterObject netcoreapp31 .NET Core 3.1 19.3060 ns 0.4173 ns 0.5571 ns 19.4856 ns 8.480 0.45 6
GetterCached netcoreapp31 .NET Core 3.1 2.9276 ns 0.0156 ns 0.0146 ns 2.9313 ns 1.295 0.03 3
                   
DirectlyString netcoreapp5 .NET Core 5.0 2.2455 ns 0.0084 ns 0.0078 ns 2.2460 ns 1.000 0.00 2
DirectlyInt netcoreapp5 .NET Core 5.0 0.0000 ns 0.0000 ns 0.0000 ns 0.0000 ns 0.000 0.00 1
ReflectString netcoreapp5 .NET Core 5.0 162.8780 ns 0.7135 ns 0.6674 ns 162.8741 ns 72.538 0.45 7
ReflectInt netcoreapp5 .NET Core 5.0 171.1380 ns 0.4173 ns 0.3699 ns 171.1414 ns 76.217 0.31 8
GetterString netcoreapp5 .NET Core 5.0 8.6244 ns 0.1891 ns 0.1769 ns 8.5469 ns 3.841 0.08 5
GetterInt netcoreapp5 .NET Core 5.0 6.5511 ns 0.0347 ns 0.0325 ns 6.5634 ns 2.917 0.02 4
GetterObject netcoreapp5 .NET Core 5.0 9.0732 ns 0.0306 ns 0.0272 ns 9.0735 ns 4.041 0.02 6
GetterCached netcoreapp5 .NET Core 5.0 2.8223 ns 0.0728 ns 0.0681 ns 2.8190 ns 1.257 0.03 3

summary

Use expressions to create delegates instead of PropertyInfo Reading and writing properties works well .

Developers can also directly refer to Newbe.ObjectVisitor Package to use packaged ValueGetter and ValueSetter.

I'm just a knowledge Porter

Release notes

Use samples

Share with others

GitHub Project address ：https://github.com/newbe36524/Newbe.ObjectVisitor

Gitee Project address ：https://gitee.com/yks/Newbe.ObjectVisitor

Newbe.ObjectVisitor

 

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