[bradfitz]

"On the other hand, Fil-C is quite slow. It's 200x slower than legacy C right now. "

[pizlonator]

It's slow for good reasons, like ensuring that I have a super reliable compiler that lets me port a lot of stuff without dealing with miscompiles.

Fil-C will be fast, don't worry.

(The manifesto enumerates the hilarious reasons for the slowness. If you had read that, you probably wouldn't have cited the 200x.)