Plz realize that the science app is really one code base compiled with the best choice libraries ** available for each platform, the rewrite taking 8-10 months at considerable cost (human resource). What's available for Linux seems then to make it the choice platform for this Integer intense processing.

** Gray cells hazy, one of the tech/programmers once commented about there being a choice of 100+ such libs... that's allot of testing off an over overloaded work schedule, making sure the product is still outputting the absolute identical result... which it was as the old and new version proofed during the transition.