Yes, but the benchmark is not "how fast does V8 translate scheme to JS", it's "how fast does V8 run benchmarks in javascript that where translated from scheme some time ago".
Atleast that's how i understand it.
That's true, but machine-generated code can be pretty nutty, depending on what exactly the Scheme2JS compiler does. It's legitimate JS code, but it might not be representative of what JS-written-in-JS looks like.
I think it'd be useful to benchmark GWT-generated JS (and also Objective-J), but not Scheme2Js, which is rarely if ever used in practice. Compilers for different languages will emit code with completely different performance characteristics and feature usage patterns. (For instance, Objective-J particularly stresses the call site caching mechanisms in modern JavaScript engines with its "objc_msgSend" equivalent, since the indirect call in that function branches to so many different call sites.)
