No, look again at the numbers - asm.js gets much closer to native speed than normal JS, in many cases, especially large apps. In addition to the numbers in the

No, look again at the numbers - asm.js gets much closer to native speed than normal JS, in many cases, especially large apps. In addition to the numbers in the article, you can see for example, http://kripken.github.io/mloc_emscripten_talk/#/28 http://kripken.github.io/mloc_emscripten_talk/#/28 asm.js code makes it easier to get within reach of native performance.