Does using replacement variables has imapct on performance?

[Chris8]

Thanks! Well, that's what I was guessing too, cause that was logical, however, sometimes things are not that simple as they seem to be and it's better to ask and to make sure just in case. ^^'
I think I get it now.
And I think I will never get to know what would be better in terms of performance so, I will just proceed with one option.
My server load averages are always at 0 cause the site is still in development stage and not live. I'm not worrying about future sever needs but I always try to think 5 steps forward with everything... just in case.