TFA lists WebKit as a project that "does it wrong".

The author should read https://webkit.org/blog/6161/locking-in-webkit/ so that they understand what they are talking about.

WebKit does it right in the sense that:

- It as an optimal amount of spinning

- Threads wait (instead of spinning) if the lock is not available immediately-ish

And we know that the algorithms are optimal based on rigorous experiments.