I tested it a moment ago, it gives me arround 60 fps when i look down that corridor.
That's lower then on other places of the map, but still a good framerate for me.
(Laptop: Acer Apire 5742G, Intel core i5-460M, 4GB DDR3 RAM, nVidea Geforce GT420M, Win7 Pro 64bit)
It's obviouse that there is a difference on this, because half of the map needs to be rendered from this view.
While i wouldn't say that the map is badly optimized, there's always something that can be done to increase performance.
For now all you can do is lower your settings, turn AA off and reduce AF to trilinear, turn off HDR and maybe even lower model/texture detail level.
Also it helps to disable "dynamic lights on explosions" and "heat wave effects" in the advanced multiplayer options.
In combination with a high lightmap resolution (2 or 4), these effects are able to cause a huge framedrop whenever they occure.
A few suggestions if you're going to post about performance issues again:
use net_graph 1 to display your fps
It's also a good idea to post your PC specs
and for things like the nodraw:
use cl_showpos 1 to display your position within the map, otherwise the mapper possibly won't find it.