F#与C#的“不安全”块具有相同的语法

发布时间：2020-12-15 04:28:02 所属栏目：百科来源：网络整理

导读：许多阵列边界检查会降低速度,这对2D阵列尤其如此.有没有办法在F#中编写不安全的代码块？解决方法我不是一个 F#程序员,但据我看来,它似乎没有 unsafe关键字. 您可以通过将2D数组转换为一维数组来获得性能提升. Advice 5: Until we get this right,I would s

许多阵列边界检查会降低速度,这对2D阵列尤其如此.有没有办法在F#中编写不安全的代码块？

解决方法

我不是一个 F#程序员,但据我看来,它似乎没有 unsafe关键字.

您可以通过将2D数组转换为一维数组来获得性能提升.

Advice 5: Until we get this right,I
would suggest that .NET users do what
many C++ numerical programmers do:
write a class to implement your
n-dimensional array. This would be
represented as a 1-dimensional array,
and the relevant accessors would
convert n indices into 1 via
appropriate multiplications. We
almost certainly wouldn’t eliminate
the bounds check into the 1-d array,
but at least we’d only do one check!

Array Bounds Check Elimination in the CLR

（编辑：李大同）

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