> Cautionary tale for the ‘rewrite it in Rust’ camp Mozilla, famously, made multiple attempts to update Firefox's rendering engine to take advantage of multipl

> Cautionary tale for the ‘rewrite it in Rust’ camp Mozilla, famously, made multiple attempts to update Firefox's rendering engine to take advantage of multiple CPU cores that had to be abandoned before they switched over to Rust and started to see some success. >Parallelism is a known hard problem, and the CSS engine is very complex. It’s also sitting between the two other most complex parts of the rendering engine — the DOM and layout. So it would be easy to introduce a bug, and parallelism can result in bugs that are very hard to track down, called data races. https://hacks.mozilla.org/2017/08/inside-a-super-fast-css-engine-quantum-css-aka-stylo/ https://hacks.mozilla.org/2017/08/inside-a-super-fast-css-en...