str::to_owned doesn't generate exactly the same code as String::from

[hanna-kruppe]

to_owned is not marked #[inline] while String::from is. Check the assembly, one is inlined and the other isn't. It probably doesn't matter and in fact I can't measure any performance difference with short strings (and long ones are probably dominated by the memcpy anyway). Maybe we should just stop inlining from to make binaries a tiny bit smaller. Either way, it's unfortunate that these two conversion methods, which are often described as being exactly equivalent, aren't.