Quick test on the BananaBread benchmark: Without asm.js

  preload : 53.698 seconds
  startup : 11.904 seconds
  gameplay: 369.86 total seconds
  gameplay: 196.538 JS seconds

With asm.js

  preload : 55.513 seconds
  startup : 7.093 seconds
  gameplay: 75.848 total seconds
  gameplay: 54.318 JS seconds