On Tue, Oct 30, 2012 at 4:31 PM, Dave Townsend <dtowns...@mozilla.com> wrote:
> This plan really worries me. [...] I'm worried that we'll just break the
> platform b2g runs on in subtle ways that we might not notice before shipping.
> It's pretty concerning to have a fundamental change to how components and
> modules are loaded on a new platform where to my knowledge we don't yet have
> good automated testing (please please someone prove me wrong on this).

I think we all share your concern; you'll see a fair bit of discussion
about this in the bug.

But this change gets a huge memory win on a highly-memory-constrained
device, and we don't have an alternative which would be ready in time.

https://bugzilla.mozilla.org/show_bug.cgi?id=798491

On Tue, Oct 30, 2012 at 4:31 PM, Dave Townsend <dtowns...@mozilla.com> wrote:
> On 10/30/12 12:08, Alex Keybl wrote:
>>>
>>> We have explored various
>>> techniques to lower the overhead of a compartment, but unfortunately
>>> those
>>> fixes that would help at all are either too risky for or cannot be
>>> completed in time for Gecko 18.  We have decided instead to consolidate
>>> all
>>> JSMs and JS components into a single compartment in B2G.
>>
>>
>>
>> In case people missed this part specifically, I just want to point out
>> that the change in bug 798491 are targeted for FF18 (Aurora). See comment 75
>> for philikon's early risk evaluation. From our read of the bug, although
>> this represents major code change, we do not expect major desktop/Android
>> regressions, especially with a day or two of bake time on m-c to start.
>>
>> -Alex
>
>
> This plan really worries me. I agree that it is unlikely we'll see
> desktop/android regressions. I'm more worried that we'll just break the
> platform b2g runs on in subtle ways that we might not notice before
> shipping. It's pretty concerning to have a fundamental change to how
> components and modules are loaded on a new platform where to my knowledge we
> don't yet have good automated testing (please please someone prove me wrong
> on this).
>
>
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