Performance Comparisons Between .NET Framework Versions

More imformation about running these types of benchmarks in .Net can be found here: https://benchmarkdotnet.org/articles/guides/getting-started.html

• Enum.ToString()
• Exceptions

Enum.ToString()

Tests simple Enum.Tostring() performance. Long story short, .NET core is the clear winner, running ~10 times faster than .NET Framework during Enum.ToString() tests.

Method	Job	Runtime	Mean	Error	StdDev	Ratio
GetEnumToString	.NET 4.6.2	.NET 4.6.2	325.84 ns	1.954 ns	1.732 ns	1.00
GetEnumToString	.NET 4.7.2	.NET 4.7.2	331.86 ns	1.951 ns	1.825 ns	1.02
GetEnumToString	.NET 4.8	.NET 4.8	329.34 ns	1.752 ns	1.639 ns	1.01
GetEnumToString	.NET Core 2.2	.NET Core 2.2	54.75 ns	0.564 ns	0.500 ns	0.17
GetEnumToString	.NET Core 3.1	.NET Core 3.1	27.27 ns	0.172 ns	0.144 ns	0.08
GetEnumToString	.NET Core 5.0	.NET Core 5.0	28.62 ns	0.382 ns	0.319 ns	0.09

Below are the test details and definitions.

namespace PerformanceTests.Console.Tests
{
    using BenchmarkDotNet.Attributes;
    using BenchmarkDotNet.Jobs;

    [SimpleJob(RuntimeMoniker.Net462, baseline: true)]
    [SimpleJob(RuntimeMoniker.Net472)]
    [SimpleJob(RuntimeMoniker.Net48)]
    [SimpleJob(RuntimeMoniker.NetCoreApp22)]
    [SimpleJob(RuntimeMoniker.NetCoreApp31)]
    [SimpleJob(RuntimeMoniker.NetCoreApp50)]
    [RPlotExporter]
    public class TestEnumToStringPerformance
    {
        [Benchmark]
        public string GetEnumToString()
        {
            return TestEnum.StringifyMe.ToString();
        }

        private enum TestEnum
        {
            StringifyMe,
        }

    }
}

Benchmark details:

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.18363.778 (1909/November2018Update/19H2)
Intel Core i7-4770K CPU 3.50GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=5.0.100-preview.3.20216.6
[Host] : .NET Core 5.0.0 (CoreCLR 5.0.20.21406, CoreFX 5.0.20.21406), X64 RyuJIT
.NET 4.6.2 : .NET Framework 4.8 (4.8.4150.0), X64 RyuJIT
.NET 4.7.2 : .NET Framework 4.8 (4.8.4150.0), X64 RyuJIT
.NET 4.8 : .NET Framework 4.8 (4.8.4150.0), X64 RyuJIT
.NET Core 2.2 : .NET Core 2.2.6 (CoreCLR 4.6.27817.03, CoreFX 4.6.27818.02), X64 RyuJIT
.NET Core 3.1 : .NET Core 3.1.3 (CoreCLR 4.700.20.11803, CoreFX 4.700.20.12001), X64 RyuJIT
.NET Core 5.0 : .NET Core 5.0.0 (CoreCLR 5.0.20.21406, CoreFX 5.0.20.21406), X64 RyuJIT

Links to the implemenatations:

• .Net Core https://github.com/dotnet/runtime/blob/a80e6d4c69fcfa1e17e17130c144a567b23a12a9/src/libraries/System.Private.CoreLib/src/System/Enum.cs#L898
• .Net Framework https://referencesource.microsoft.com/#mscorlib/system/enum.cs,795

Exceptions

Tests the performance of throwing/catching an exception during a divide by zero operation. .NET Framework is ~3 times as fast as .NET Core when executing the code below.

Method	Job	Runtime	Mean	Error	StdDev	Ratio	RatioSD
TestExceptionAsControlFlow	.NET 4.6.2	.NET 4.6.2	8.235 μs	0.0787 μs	0.0698 μs	1.00	0.00
TestExceptionAsControlFlow	.NET 4.7.2	.NET 4.7.2	8.183 μs	0.1017 μs	0.0849 μs	0.99	0.01
TestExceptionAsControlFlow	.NET 4.8	.NET 4.8	8.167 μs	0.0990 μs	0.0926 μs	0.99	0.01
TestExceptionAsControlFlow	.NET Core 2.2	.NET Core 2.2	24.234 μs	0.1346 μs	0.1051 μs	2.94	0.03
TestExceptionAsControlFlow	.NET Core 3.1	.NET Core 3.1	24.440 μs	0.0984 μs	0.0921 μs	2.97	0.03
TestExceptionAsControlFlow	.NET Core 5.0	.NET Core 5.0	25.207 μs	0.2087 μs	0.1953 μs	3.06	0.04

Below are the test details and definitions.

namespace PerformanceTests.Console.Tests
{
    using BenchmarkDotNet.Attributes;
    using BenchmarkDotNet.Jobs;
    using System;

    [SimpleJob(RuntimeMoniker.Net462, baseline: true)]
    [SimpleJob(RuntimeMoniker.Net472)]
    [SimpleJob(RuntimeMoniker.Net48)]
    [SimpleJob(RuntimeMoniker.NetCoreApp22)]
    [SimpleJob(RuntimeMoniker.NetCoreApp31)]
    [SimpleJob(RuntimeMoniker.NetCoreApp50)]
    [RPlotExporter]
    public class UsingExceptionsAsControlFlow
    {
        public int Value { get; set; }

        [GlobalSetup]
        public void Setup()
        {
            this.Value = 0;
        }

        [Benchmark]
        public int TestExceptionAsControlFlow()
        {
            try
            {
                return this.Value / 0;
            }
            catch (DivideByZeroException)
            {
                return 0;
            }
        }
    }
}

Benchmark details:

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.18363.778 (1909/November2018Update/19H2)
Intel Core i7-4770K CPU 3.50GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=5.0.100-preview.3.20216.6
[Host] : .NET Core 5.0.0 (CoreCLR 5.0.20.21406, CoreFX 5.0.20.21406), X64 RyuJIT
.NET 4.6.2 : .NET Framework 4.8 (4.8.4150.0), X64 RyuJIT
.NET 4.7.2 : .NET Framework 4.8 (4.8.4150.0), X64 RyuJIT
.NET 4.8 : .NET Framework 4.8 (4.8.4150.0), X64 RyuJIT
.NET Core 2.2 : .NET Core 2.2.6 (CoreCLR 4.6.27817.03, CoreFX 4.6.27818.02), X64 RyuJIT
.NET Core 3.1 : .NET Core 3.1.3 (CoreCLR 4.700.20.11803, CoreFX 4.700.20.12001), X64 RyuJIT
.NET Core 5.0 : .NET Core 5.0.0 (CoreCLR 5.0.20.21406, CoreFX 5.0.20.21406), X64 RyuJIT