Imagine how much work we would do with those additional ms per day.

Once upon a time, I was tasked to rewrite build scripts for windows based team from .bat files to bash scripts (via a git-bash). People on that team were not exactly unix fans, in fact they resisted hard almost everything coming from us linux weirdos. But reduction in build time was so big they asked for this and embraced it with genuine love.

I bet it was a bit more than a few ms per day.