Tuesday, 5 March 2013

Re: Adding Spidermonkey 17esr to Raring

yes, indeed. But debian will be in for some confusion, they current package the non-standalone engine as libmozjs17d etc (as part of iceweasel).

- Tim

On 06/03/13 18:06, Dmitry Shachnev wrote:
> Yes, a new source package (mozjs17) makes sense I think. As the
> current package is in sync with Debian, maybe it'll be a good idea to
> get the new one uploaded there, as well.
>
> --
> Dmitry Shachnev
>
> On 3/6/13, Tim <tim@feathertop.org> wrote:
>> Its currently at RC, due for release in the next few days.
>>
>> https://bugzilla.mozilla.org/show_bug.cgi?id=735599#c44
>>
>> I have spent quite a bit of time, patching their build system etc, to make
>> this happen, but still it has taken forever to get to this point.
>>
>> - Tim
>>
>> On 06/03/13 17:29, Dmitry Shachnev wrote:
>>> According to <https://developer.mozilla.org/en-US/docs/SpiderMonkey>,
>>> "SpiderMonkey 1.8.5 is the most recent standalone source code
>>> release", and that's what we already have in Debian/Ubuntu
>>> (src:mozjs). I also don't see anything newer on their FTP.
>>>
>>> Are you sure there was a new *standalone* release?
>>>
>>> --
>>> Dmitry Shachnev
>>>
>>> On 2/28/13, Tim <tim@feathertop.org> wrote:
>>>> Hi,
>>>> Finally after about 2 years Mozilla are releasing a version of the
>>>> standalone spidermonkey engine. This release is based off the engine
>>>> from
>>>> Firefox 17esr. It has taken quite a long time to get to this stage, and
>>>> I
>>>> was hoping it would happen earlier in the cycle, but I would still
>>>> like to get this into raring if at all possible. My motivation for this
>>>> is
>>>> the great improvements it brings to gnome-shell.
>>>>
>>>> This release fixes a number of high impact issues including greater
>>>> performance, greatly reduces memory leaks, and finally solves the long
>>>> standing and quite common issue with Garbage Collection deadlocks. I
>>>> ported
>>>> gjs to this engine a few months ago and while it hasnt landed
>>>> upstream yet, the plan for 3.8 is to branch gjs and release 2 versions
>>>> of
>>>> gjs, one for each engine. This new gjs is API compatible with 3.6,
>>>> and in fact works great with gnome-shell 3.6, so essentially it would be
>>>> great to bring these improvements into raring.
>>>>
>>>> There are big API/ABI breaks in this release compared to previous 185
>>>> release. Currently none of the other rdepends have been ported as far as
>>>> I
>>>> know, and its probably not realistic to get all of them ported this
>>>> cycle.
>>>> Mostly the porting is easy enough, however it does result in quite
>>>> large diff's so would really want to be done upstream, as it would
>>>> probably
>>>> be a nightmare to maintain these as Distro patches. Add to this
>>>> CouchDB is fundamentally incompatible with this new release, due to
>>>> their
>>>> use of illegal javascript syntax (in 185 enforcement of this was
>>>> optional) as a core feature of their user scripts.
>>>>
>>>> Given the above, replacing/upgrading the old package is simply not going
>>>> to
>>>> be feasible this cycle. I propose adding this new engine as an
>>>> additional library, I discussed this on IRC a bit with seb128 and
>>>> chriscoulson, however they were unsure about whether this is something
>>>> that
>>>> could want to go ahead and suggested that I raise it here for more
>>>> widespread discussion. Main issues raised were overall its a low
>>>> priority
>>>> but
>>>> also some security concerns.
>>>>
>>>> Hopefully now with all the patches on their way into the upstream
>>>> mozilla
>>>> code-base, future releases will be more regular, they will be tracking
>>>> the firefox esr releases. Although not really guaranteed just yet, it is
>>>> planned for some point releases over the life of each version.
>>>> Probably issues with overlapping versions will continue to be a problem
>>>> until the JS C API settles down, next release 24 will again break all
>>>> rdepends.
>>>>
>>>> - Tim
>>>>
>>>>
>>>> --
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>>


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