Performance With Parameters Value

Hi,

I have a user defined function which has 5 parametes to pass, now while running the Table Valued Function using hardcoded parametes value its taking only 10 seconds , but while running the UDF by declaring the parametes value and
assigned them value its taking more than 3 minutes.

here is the example

First case

select * from UDF_Test('A',76,'C',987,''X')

This one taking only 10 minutes to run.

Second case


Declare @P1 varchar,


@P2 Int,
@P3 varchar,
@P4 int,
@P5 varchar


SET @P1 = 'A'

@P2= 76

@P3='C'
@P4 = 987
@P5='X'

Select * from TVF_Test(@P1,@P2,@P3,@P4,@P5) as test
where test.column1=@P1

Any help will be appreciated.

Thanks