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Y'know,

That GCC is six years old.[1] Go, Rust, Dart and V8 didn't even exist when it was released. Maybe update that if anything?

[1] http://gcc.gnu.org/releases.html

And since it's a Mac, it is probably llvm-gcc (GCC with an LLVM backend).

A colleague/friend who is developing neural network software recently switched from gcc 4.2.1 to 4.5 (which is still old) and got a 50% speed increase without touching any code.

That's the first thing I thought, too. I'd like to see both Go 1.1 and Go 1.0.3 for a comparison (on this benchmark). I'm hoping that before long we'll be able to count on Go being within a factor of 2 of plain C by most benchmarks.

And I'd like to see CPython 3.3 in addition to PyPy.

But it's quite interesting as is. Thanks.

It's been just 2 days since go1.1beta1 was released, the other language implementations seem more out-of-date than that.

There are more low-hanging performance fruits in the immature languages.

That said, of course all should be up to date.

See danieldk's comment -- https://news.ycombinator.com/item?id=5502984

That doesn't negate the fact that I want to see the performance of go1.1 :D

Truthfully though, I didn't notice the others were out of date. I bet OP will update them all :P