SQL Server: Select in vs or?

Question

Which is faster?

SELECT UserName
FROM dbo.UserTable
WHERE UserID in (1,3,4)

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SELECT UserName
FROM dbo.UserTable
WHERE UserID =         


        

Answer 1

This is relevant when it comes to producing SQL via Linq. There are some instances where the sql created is in the form of: field='xxx' OR field='yyy'.