At Google I/O this year, Google indicated some interest in asm.js, and noted that since asm.js was released V8 has already gotten significantly faster in runnin

At Google I/O this year, Google indicated some interest in asm.js, and noted that since asm.js was released V8 has already gotten significantly faster in running asm.js code. With regards to Dart, Google has said that they plan to get the language formally standardized after reaching the stable 1.0 release. It doesn't make sense to try to standardize something that's still in beta.