Javascript is best known for being the only language that runs on any web browser. Say a heavy web app needs to be run faster. If we think to bring a totally new language for this, we need to make sure that all browsers support it. Obviously, not all browser developers would agree to support u!

So better option is to use javascript for this as it already has this support. But how? What about using only a selected javascript definitions that support faster performance. That sounds great and that is the exact approach taken by asm.js which was designed from a research project of Mozilla. The target of Mozilla is to bring asm.js to closer to the native speed.

Look at the below graph published by official asm.js page to understand that asm.js is so close to native speed.