It took me a couple years, 22 years ago, to figure out what fit on my new bike made me the fastest, which also turned out to be the most comfortable. I've used the same basic fit on the same bike ever since. After my first pro bike fit session ever, a few years ago, the fitter had me move my hands back by 3 cm and up by 1 cm. I liked the old fit better, but too much bother to change all the components back the way they were. No big deal.
__________________
Results matter