Template modifications - server intensive?

[DeanLag]

Hello all!

I was just wondering if template conditionals would be CPU intensive?
My hosting company just contacted me and said that my showthread.php is consuming a lot of CPU resources.

Would something like:
< if member id is 1, then background colour = blue,
else background colour = normal.>
Moreover, would something like:
<if threadid = 5 or threadid =10 or threadid = 50, then background colour = red
else
if threadid = 125 or threadid = 234
background colour = yellow
else
background colour = normal.>

Would the above codes be CPU intensive?
I have 4 days to rectify this or they'll terminate my VPS <_<

Thank you in advance