对于时间关键的 C# 代码，我是否应该重视结构中的静态方法（而不是非静态方法）？

Question

通过一些研究，我知道下面的静态方法可以使 JIT 内联。但是非静态的也可以内联吗？

如果代码真的是时间紧迫的，我是否应该费心评估这种静态方法而不是非静态方法？

public struct PixelData
{
    public readonly uint raw;

    public PixelData(uint raw)
    {
        this.raw = raw;
    }

    //JIT inlines this
    static bool HasLineOfSight(PixelData p)
    {
        return (p.raw & 0x8000) != 0;
    }

    //But what about this?
    int GetWeight()
    {
        return (int)(raw & 0x3FFF);
    }

}

Answer 1

MSDN：Static Classes and Static Class Members

A call to a static method generates a call instruction in Microsoft intermediate language (MSIL), whereas a call to an instance method generates a callvirt instruction, which also checks for a null object references. However, most of the time the performance difference between the two is not significant.

Answer 2

您可以将 [MethodImpl(MethodImplOptions.AggressiveInlining)] 应用于该方法以尝试强制内联：

[MethodImpl(MethodImplOptions.AggressiveInlining)]
int GetWeight()
{
    return (int)(raw & 0x3FFF);
}

但是，从 this programmer.se answer 可以看出，内联与非内联实际上差别不大：

Results

struct get property                               : 0.3097832 seconds
struct inline get property                        : 0.3079076 seconds
struct method call with params                    : 1.0925033 seconds
struct inline method call with params             : 1.0930666 seconds
struct method call without params                 : 1.5211852 seconds
struct intline method call without params         : 1.2235001 seconds

您最好让编译器自行其是，直到您发现您看到了一些真正的可衡量性能问题。

对于时间关键的 C# 代码，我是否应该重视结构中的静态方法（而不是非静态方法）？

For time-critical C# code, should I value static methods in my struct (over non-static ones)?

c#

optimization

compilation