Are .NET 4.0 Runtime slower than .NET 2.0 Runtime?
- by DxCK
After I upgraded my projects to .NET 4.0 (With VS2010) I realized than they run slower than they were in .NET 2.0 (VS2008). So i decided to benchmark a simple console application in both VS2008 & VS2010 with various Target Frameworks:
using System;
using System.Diagnostics;
using System.Reflection;
namespace RuntimePerfTest
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(Assembly.GetCallingAssembly().ImageRuntimeVersion);
Stopwatch sw = new Stopwatch();
while (true)
{
sw.Reset();
sw.Start();
for (int i = 0; i < 1000000000; i++)
{
}
TimeSpan elapsed = sw.Elapsed;
Console.WriteLine(elapsed);
}
}
}
}
Here is the results:
VS2008
Target Framework 2.0: ~0.25 seconds
Target Framework 3.0: ~0.25 seconds
Target Framework 3.5: ~0.25 seconds
VS2010
Target Framework 2.0: ~3.8 seconds
Target Framework 3.0: ~3.8 seconds
Target Framework 3.5: ~1.51 seconds
Target Framework 3.5 Client Profile: ~3.8 seconds
Target Framework 4.0: ~1.01 seconds
Target Framework 4.0 Client Profile: ~1.01 seconds
My initial conclusion is obviously that programs compiled with VS2008 working faster than programs compiled with VS2010.
Can anyone explain those performance changes between VS2008 and VS2010? and between different Target Frameworks inside VS2010 itself?
