1124823 - HTTP cache: Allow on-demand intermediate memory caching of (otherwise disk cached) content

Status: NEW

(Core :: Networking: Cache, enhancement, P5)

Description

[Honza Bambas (:mayhemer)]

Two good reasons:
- get rid of ImageLib cache and let it rely on HTTP caching
- cache some of render blocking data (CSS,JS,HTML)

Now we have it just as an overall #define compile time option.  Would be nice to have the option at run-time and per entry.

Impl notes: we need a new pool (maybe generalize them completely?) and a new limit with a new pref, what should the limit be? ; new API to instruct the cache (through the nsICachingChannel iface?).  What about prefetches?  Do we control them too?

Comment 1

[Seth Fowler [:seth] [:s2h]]

Thanks for filing this, Honza!

One idea that I think might make this more palatable to the memshrink folks would be to land this pref'ed off initially, and pref it on at the same time that we disable the ImageLib cache. We'd then be in some sense "transferring" the ImageLib cache's memory usage to the generic HTTP in-memory cache, which would probably reduce the impact on e.g. AWSY quite a bit.

Comment 2

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258