gistfile1.cs

[MethodImpl(MethodImplOptions.NoInlining)]
static object UseBox(int num)
{
  return num;
}
 
private class IntWrapper
{
  public int Num;
}
 
[MethodImpl(MethodImplOptions.NoInlining)]
static object UseWrapper(int num)
{
  return new IntWrapper { Num = num };
}
 
static void Main()
{
  CodeTimer.Initialize();

  CodeTimer.Time("Box", 10000000, () => UseBox(10));
  CodeTimer.Time("Wrapper", 10000000, () => UseWrapper(10));
}

/*
Box
    Time Elapsed:   1,274ms
    CPU Cycles:     3,047,706,156
    Gen 0:          457
    Gen 1:          0
    Gen 2:          0

Wrapper
    Time Elapsed:   1,056ms
    CPU Cycles:     2,527,914,244
    Gen 0:          457
    Gen 1:          0
    Gen 2:          0
*/