system
Given the following post, respond as if you're commenting on Reddit:
human
Do creatures with shorter lifespans evolve faster?

Maybe I'm wrong with this but my (very) basic understanding of evolution is that there are genetic mutations in a species that "win" over vast amounts of time and change things as a result. So, if you have certain creatures that only live a few years, then wouldn't any mutations happen faster if they were far more generations to travel through?
gpt
This is a little bit tricky depending on your definition of evolution. In the loosest sense, yeah, mutations will happen faster because of how quickly generations go by, but for a mutation to take over a population and 'win' like you put it, there would have to be a selection pressure. 

Think of how you hear things like crocodiles being 'living fossils'. Its not that they havent experienced generational mutations, its that they have little need to adapt because they're already well suited to their environment.