On 2/28/19, Dirk Munk <[email protected]> wrote:
>
> I've set the following cache parameters with about:config :
>
> 1. browser.cache.use_new_backend = 1 (true)
> This activates a 'new' cache mechanism, that seems to be faster and more
> stable than the old one. It is unclear why this isn't the default
> setting.

It's a programmers' law: There is no fix as permanent as a 'temporary' fix:
  https://bugzilla.mozilla.org/show_bug.cgi?id=913806#c8

The pref that is enabled by default is "browser.cache.use_new_backend_temp"

I still have the defaults for
  browser.cache.use_new_backend  set to 0
  browser.cache.use_new_backend_temp  set to true
And all my cache files are under the cache2 dir which agrees with
  https://www.janbambas.cz/mozilla-firefox-new-http-cache-is-live/
    1 – enable, use the brand new HTTP cache (files are stored under
cache2 directory in your profile)


> 2. browser.cache.memory.capacity = 4194304 (4 GB)
> This sets the *maximum* memory capacity of the cache to 4 GB. It does
> *not* mean that Seamonkey will always use 4 GB of cache memory, it
> merely means that the cache memory is allowed to grow up to 4 GB *if*
> Seamonkey needs it. For that to happen there must be many, many tabs open.

http://kb.mozillazine.org/Browser.cache.memory.capacity
  For e-mail and newsgroups (i.e., Thunderbird and SeaMonkey),
messages for IMAP accounts are cached as well in either disk or memory
cache, unless synchronized locally already. This reduces the amount of
network activity to reload previously viewed messages. This preference
controls the maximum amount of memory to use for caching decoded
images, messages, and chrome items (application user interface
elements).

Maybe if you haven't compacted your mail in a while & all the deleted
msgs are still in the file?  Or you're looking at newsgroups with a
long retention period?  Because it seems like the only web pages that
might need >10 MB of cache are if videos are cached.


> 3. browser.cache.disk.enable = 0 (false)
> This setting *disables* the disk cache. After I made this setting,
> Seamonkey became extremely fast compared with an active disk cache.
> However, keep in mind that you should only use this setting after
> increasing the memory capacity of the cache.

I still think it's a bad idea, but I don't have a gigabit speed
internet link or <10 millisecond response time to the web sites I
frequent like I recall somebody claiming they had.

https://lifehacker.com/speed-up-firefox-by-moving-your-cache-to-ram-no-ram-di-5687850
  Update: One of the folks over at Mozilla laid out a few downsides to
using this method. It's not a bad idea, per se, but it's good to be
informed about what this does vs. the default settings (and how future
plans for Firefox will work with this tweak).
---- links to
https://groups.google.com/forum/?_escaped_fragment_=msg/mozilla.dev.apps.firefox/nqYLKTsOAbs/Fh7XO2PVUn0J

Lee
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