Clang compiles much slower and bigger Firefox binaries than GCC 8/9 (hubicka.blogspot.com)

Indeed, and "much slower" is somewhat ambiguous as its a lot more nuanced than that based on what I've read so far. I know Firefox switched to clang+llvm for more reasons than just "binary size and program speed" alone.

Yes. Editorializing like that breaks the site guidelines: https://news.ycombinator.com/newsguidelines.html. That led a bunch of users to correctly flag this post, which meant that https://news.ycombinator.com/item?id=18794382 made the front page even if it was posted later.

We've moved most of the comments from this thread into that one.