I find that you can usually safely disregard the opinion of people who state “<thing> probably doesn’t matter in practice.”

Measure yourselves. Maybe it does. Maybe it doesn’t matter. It doesn’t change that this “it probably doesn’t matter in practice” sentiment is the primary reason a typical web request today is in the order of 20-30x slower than it should be.

For this matter, if you’re using Libyaml to parse one yaml file, you’re probably fine. If you’re AWS and use libyaml, you’re definitely going to feel this change.