Hi I believe that this change may be the caused of https://bugzilla.mozilla.org/show_bug.cgi?id=1477254 <https://bugzilla.mozilla.org/show_bug.cgi?id=1477254>
That is, the pref value set in all.js no longer overrides the default value set in StaticPrefs. The problem occurs mostly with e10s on, when e10s is disabled, I see the problem only about 5% of the time. JY > On 13 Jul 2018, at 10:37 pm, Kris Maglione <kmagli...@mozilla.com> wrote: > > tl;dr: A major change to the architecture preference service has just landed, > so please be on the lookout for regressions. > > We've been working for the last few weeks on rearchitecting the preference > service to work better in our current and future multi-process > configurations, and those changes have just landed in bug 1471025. > > Our preference database tends to be very large, even without any user values. > It also needs to be available in every process. Until now, that's meant > complete separate copies of the hash table, name strings, and value strings > in each process, along with separate initialization in each content process, > and a lot of IPC overhead to keep the databases in sync. > > After bug 1471025, the database is split into two sections: a snapshot of the > initial state of the database, which is stored in a read-only shared memory > region and shared by all processes, and a dynamic hash table of changes on > top of that snapshot, of which each process has its own. This approach > significantly decreases memory, IPC, and content process initialization > overhead. It also decreases the complexity of certain cross-process > synchronization logic. > > But it adds complexity in other areas, and represents one of the largest > changes to the workings of the preference service since its creation. So > please be on the lookout for regressions that look related to preference > handling. If you spot any, please file bugs blocking > https://bugzil.la/1471025. > > Thanks, > Kris > _______________________________________________ > firefox-dev mailing list > firefox-...@mozilla.org > https://mail.mozilla.org/listinfo/firefox-dev
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