[jmilloy]

>He never said he doesn't advocate performance.

Agreed. But Guido didn't advocate performance, or anything, so fijal is trying to disagree with him about a topic he didn't state an opinion on. There's no need to make up a disagreement. Imagine if fijal instead said:

"This is a fine list of techniques if you are willing to sacrifice your abstractions. At PyPy, we're not willing to do that, and we still achieve sufficiently high performance by..."