[Koha-bugs] [Bug 15341] Performance - Retrieve all sysprefs at once

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=15341

--- Comment #16 from Jacek Ablewicz <abl at biblos.pk.edu.pl> ---
Jonathan,

I wonder what would you think about resurrecting this bug? Starts to look like
a better and better idea to me, it would:

- allow to flush all L2 syspref cache entries selectively (storing them in
separate [sub]namespace still isn't taking care of that, due to the memcached
constraints in this matter)
- make the idea from Bug 16140 (aka intelligent L1 cache flush under plack)
much more efficient
- be faster if done that way; fetching and deserialising a hash containing all
520+ system preferences takes ca 500-600 microseconds with sereal, which is an
equivalent of fetching ~20 preferences separately (and an average Koha script
is using 80+ preferences)
- there will be really just one accessor to such hash / structure
(->preference() ), and it returns a scalar, so "unsafe" fetch could be used
without introducing any risks for hard-to-catch kinds of regressions

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