What I love about this article is it's actual engineering work on an existing code base. It doesn't seek to just replace things or swap libraries in an effort to be marginally faster. It digs into the actual code and seeks to genuinely improve it not only for speed but for efficiency. This simply does not get done enough in modern projects.

I wonder if it was done more regularly would we even end up with libraries like simdjson or oj in the first place? The problem domain simply isn't _that_ hard.