c# - 在实体框架中，Any() 或 FirstOrDefault() 哪个更快？

Question

我是实体框架和 SQL 的新手。我想知道哪个（稍微）快一点：Any()或FirstOrDefault(). 请参阅下面的我想如何使用它们。

选项1

if(Comments.Select(c=>c.ObjectId).FirstOrDefault()>0) {...}

生成的 SQL

SELECT TOP (1) 
[c].[ObjectId] AS [ObjectId]
FROM [dbo].[Comments] AS [c]

选项 2

if(Comments.Select(c=>c.ObjectId).Any()) {...}

生成的 SQL

SELECT 
CASE WHEN ( EXISTS (SELECT 
    1 AS [C1]
    FROM [dbo].[Comments] AS [Extent1]
)) THEN cast(1 as bit) WHEN ( NOT EXISTS (SELECT 
    1 AS [C1]
    FROM [dbo].[Comments] AS [Extent2]
)) THEN cast(0 as bit) END AS [C1]
FROM  ( SELECT 1 AS X ) AS [SingleRowTable1]