Chapter 33 - Meet the alien designer of the original Dauntless, Arturis (Patreon)

I suppose I'd never know for certain, but if I had to make a guess, I strongly suspected that the answer was that Arturis' people, a species biologically gifted with language, including computational languages, had developed some method or formula or new math altogether to far more efficiently calculate the phase variance of the slipstream tunnel and thus Voyager had unknowingly benefited from that race’s superior method without even realizing it, because they’d learned it from the fake Starfleet ship right in front of them. To a race using this technology, that knowledge was probably worth going to war for, in fact, the Husnock would probably gleefully conquer a race just for that method. Thus, Voyager’s inferior computer was just powerful enough to handle it, at least at the lower slipstream speeds.