比较:LINQ vs LAMBDA表达 [英] Comparison : LINQ vs LAMBDA Expression

问题描述

我需要讨论LINQ和Lambda Expression的性能.

I need a discussion regarding the Performance of LINQ and Lambda Expression.

哪个更好?

推荐答案

我想您在这里谈论LINQ时是指query expression.

I guess you mean query expression when talking about LINQ here.

它们是等效的.编译器将query expression更改为等效的Lambda表达式，然后再对其进行编译，因此生成的IL完全相同.

They are equivalent. The compiler changes the query expression into the equivalent Lambda expression before compiling it, so the generated IL is exactly the same.

示例

var result = select s from intarray
             where s < 5
             select s + 1;

与

var result = intarray.Where( s => s < 5).Select( s => s+1);

请注意，如果您这样编写查询表达式:

Note that if you write the query expression like this:

var result = select s from intarray
             where s < 5
             select s;

已转换为:

var result = intarray.Where( s => s < 5);

省略了对Select的最终调用，因为这是多余的.

The final call to Select is omitted because it's redundant.

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