问题描述
为f＃记录是相同的。净结构？我看到人们谈论F＃结构，都用这个词互换使用F＃记录？就像FSharp运行速度比Python的我的算法慢，讨论一下如何利用结构作为字典键，但与code 键入托普= {X：INT; Y：INT} 为什么这个速度比一个元组在上面的链接字典键？
is f# records is the same as .net struct? I saw people talk about f# struct,are they use this term interchangable with F# records? Like in FSharp runs my algorithm slower than Python!, talking about using struct as dictionary key but with code type Tup = {x: int; y: int} Why is this faster than a tuple as a dictionary key in the link above?
推荐答案
没有，其实在F＃记录类型为引用类型仅仅是具有特殊功能的编程功能，如对性能的模式匹配，更容易不变性，更好的类型推断
No, in fact, a record type in F# is a reference type just with special functional programming features like pattern matching on properties, easier immutability, and better type inference.
我觉得Laurent的增速一定是因为其他原因，因为我们能证明托普不是值类型：
I think Laurent's speedup must have been for other reasons, because we can prove that Tup is not a ValueType:
type Tup = {x: int; y: int}
typeof<Tup>.BaseType = typeof<System.Object> //true
而
type StructType = struct end
typeof<StructType>.BaseType = typeof<System.ValueType> //true
typeof<StructType>.BaseType = typeof<System.Object> //false
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