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From GitBox <...@apache.org>
Subject [GitHub] [lucenenet] jeme edited a comment on issue #297: Investigate Performance of Math Functions in .NET Standard 2.1+
Date Wed, 16 Sep 2020 10:31:02 GMT

jeme edited a comment on issue #297:
URL: https://github.com/apache/lucenenet/issues/297#issuecomment-693274279


   I threw a very quick-n-dirty benchmark together just to get an early idea.
   
   ``` ini
   
   BenchmarkDotNet=v0.12.1, OS=Windows 10.0.18363.1016 (1909/November2018Update/19H2)
   Intel Core i7-6700 CPU 3.40GHz (Skylake), 1 CPU, 8 logical and 4 physical cores
   .NET Core SDK=5.0.100-preview.7.20366.15
     [Host]     : .NET Core 3.1.6 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.31603), X64 RyuJIT
     DefaultJob : .NET Core 3.1.6 (CoreCLR 4.700.20.26901, CoreFX 4.700.20.31603), X64 RyuJIT
   
   
   ```
   |         Method |     Mean |    Error |   StdDev |
   |--------------- |---------:|---------:|---------:|
   | MathUtil_Acosh | 115.0 μs |  2.26 μs |  3.58 μs |
   |     Math_Acosh | 243.6 μs |  4.74 μs |  6.94 μs |
   | MathUtil_Asinh | 111.5 μs |  1.55 μs |  1.45 μs |
   |     Math_Asinh | 306.2 μs |  3.28 μs |  2.91 μs |
   |   MathUtil_Log | 139.7 μs |  2.79 μs |  4.42 μs |
   |       Math_Log | 180.5 μs |  2.39 μs |  1.99 μs |
   | MathUtil_Atanh | 649.9 μs | 10.32 μs |  8.06 μs |
   |     Math_Atanh | 519.9 μs | 10.33 μs | 11.48 μs |
   
   There is quite a few things to sort out, like platformes etc. but just wanted to add the
early indications.
   This is the numbers for running the computation over 10.000 randomly selected doubles from
0 to ~int.max...
   


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