[Israel.pm] unshift vs push&reverse

[Berler Chanan]

Hi All,

I have a set of SQL needed to be run using timestamp field.
I have created an array and needs to push / unshift the SQL statements into
it for future execution 
(different conditions builds different set of SQL statements).

I am using unshift to push  the values into an array, so I will have the
correct order, but I wonder
if it is best to use push and reverse functions instead.

Can anyone direct me to performance of unshift vs. push&reverse ? or
push&pop ? 
Thanks
Chanan