Re:Asm.js in Firefox Nightly
by Millennium on Friday March 22, 2013 @05:00PM
(#5425720)
It doesn't make IE6 any faster, but the code will still run. I suspect that's what they mean by "backward compatible": it can't work miracles, but will at least do no harm.
[ Parent
| on HN ]
"Run". Yes, just ~600 times slower. At that speed it probably won't be very useful. You have ~50 msec for an operation which is perceived as instantaneous. If it takes 30 seconds (600 times as long), people will not use it. It simply isn't feasible.
This stuff is only ES3 compatible because it didn't need anything from ES5. A low-level compiler target doesn't need any of these things: http://kangax.github.com/es5-compat-table/