Dart has been developed in the open as well. It's not even released in Chrome yet, it's been fully in the open for 2 years, which is most of its existence and h

Dart has been developed in the open as well. It's not even released in Chrome yet, it's been fully in the open for 2 years, which is most of its existence and has undergone massive revision since the original seeding of the project based on community contributes. Yes, my comment was snarky. No matter how you slice it, adding a pragma, and requiring code to be written in an idiomatic format to gain maximum advantage by a conforming VM implementation is essentially introducing a new set of semantics to the VM. The fact that you can sneak it into the existing grammar (x|0) instead of needing to extend the grammar (int x), is a neat trick. I fully support what asm.js is doing, I don't have any objections to it, and once the Garbage Collection support happens, I will look very hard at making GWT support it as an output format (primarily to support PlayN). But I wish Mozilla would stop peppering everyone of their press releases with a thinly veiled snipe at competitors.