I think there's a third question, but I don't know quite how to phrase it. Maybe "how real-world fast is the language?" or "how fast is the language in the hands of someone who isn't obsessively thinking about speed?"

That is, most of the time, most of the users aren't thinking about how to squeeze the last tenth of a percent of speed out of it. They aren't thinking about speed at all. They're thinking about writing code that works at all, and that hopefully doesn't crash too often. How fast is the language for them? Does it nudge them toward faster code, or slower? Are the default, idiomatic ways of writing things the fast way, or the slow way?