using if conditions and server load
 

Does using alot of "if conditions" increase server load ?

using conditions like
<if condition="$show['member']">
<if condition="$show['guest']">
....

do they have load on servers

I use them a lot to customize appearance to visitors and member
for example the visitor has no need to know the reputation of the poster ....

Unless you really, really over use them, I doubt they have much effect at all.