Could Conditionals/If statements possibly affect performance?


Well-known member
I don't have enough deeper-level technical knowledge on this, could using a heavy amount of conditional statements in templates cause an effect on performance and render times?
Such as using a multitude of statements like:
<xen:if is="@blahblah"..
...render CSS or template..
I'm designing a few themes with a large amount of conditional/nested chains and custom Style Properties to serve as On/Off markers, just want to make sure I'm not going overboard :).

Thanks for any input,