[ns] [PATCH] Linux performance patch

[Tom Kelly <ctk21@cam.ac.uk>]

Having done some relatively long running simulations, I've made up a patch
against ns-2.1b7a containing some of my performance hacks. For the
standard validate script they improved performance by around 20% on my
Pentium III Linux box, and on some large scale simulations by up to 40%.

The main win comes through being able to use the gcc -O2 flag on Linux
without IEEE754 floating point incompatibilities, and through aggressive
use of function inlining.

The patch can be obtained via:
http://www-lce.eng.cam.ac.uk/~ctk21/code/

Hope people find it useful,
Tom