Need help with OUI expressions and CPT integration/speed

I am not sure if this has been addressed previously but I ma getting into an
issue that is killing the performance of my site as well as the physical
server.

I have been using CPT with expressions for a while now and everything has
been fine. However, due to new functionality and current inability for CPT
to nest expressions, I am forced to introduce OUI expressions into the mix.

Without OUI %IF% statement in the product specific area of a particular
category template, a category with 70 products takes ~1.5 secs to execute
(OT). When I introduce a line like %IF(g.X1 AND g.X2)% (where X1 and X2 are
variables that I set in the global header) with an %ELSE% clause, the
performance goes down to 30 secs. After enabling OpenTurbo, it sped up all
the way to 22 secs (OT). If I remove the "offending" expression, the speed
goes back up to 1.5 secs. Everything else is simple HTML with CPT
expressions.

Does anyone have any suggestions?

Thanks,
Alex