Hi,
As of today, B2G builds would be running JäegerMonkey & IonMonkey with the
Type Inference enabled, in nightly versions of Gecko 22.
IonMonkey is a big pieces of software which was new in Gecko 18. It has
been disabled in b2g18 to prevent any additional risks because b2g18 stands
as a second ESR. Now, that we are focused more on improving IonMonkey and
that it is used daily since Firefox 18 releases, we have no reasons to hold
it back.
In a few weeks, Gecko 23 should see the landing of the Baseline Compiler as
a replacement of JäegerMonkey. This will enable the JS team to reduce the
memory usage caused by Type Inference in Gecko 23.
If you experience any trouble related to the activation of IonMonkey, please
create a bug filed under "Core > JavaScript Engine" as a blocker of Bug 849103.
--
Nicolas B. Pierron
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