I would've thought there's a better way of approaching software design in 2020 than "This 50,000 employee company decided to open source one big bang grab bag of functions". Especially with a readme that doesn't include any explanation of what's in the library or why they're there.

>Folly (acronymed loosely after Facebook Open Source Library)

You literally broke your first promise. That literally translates ot FOSL. You could've used FOSL. That's a word. It makes sense. It's even a bit funny.

>is a library of C++14 components designed with practicality and efficiency in mind.

As opposed to all those components that are designed with impracticality and inefficiency in mind. I honestly don't think I can say I've ever designed anything without those two things in mind.

>Folly contains a variety of core library components used extensively at Facebook.

Which tells me literally nothing about what's in this library. How do I know what's used extensively at facbook? Last I saw it was mediocre PHP 4.