[Koha-bugs] [Bug 16166] Improve L1 cache performance

bugzilla-daemon at bugs.koha-community.org bugzilla-daemon at bugs.koha-community.org
Thu Mar 31 18:00:04 CEST 2016


--- Comment #9 from Jacek Ablewicz <abl at biblos.pk.edu.pl> ---
(In reply to Jonathan Druart from comment #7)
> (In reply to Jonathan Druart from comment #6)
> > Created attachment 49730 [details] [review] [review]
> > Bug 16166: Try to add readability
> I tried to add readability to the Koha::Cache method, but not sure I did it.

Some parts of it certainly look good to me, thanks. I skipped some parts
- wrapping scalars in { value => ... } makes it a bit slower for caching small
scalars (like system preferences) - not much slower, but measurably slower, and
this patch set is supposed to be as speed-neutral as possible even in the
"worst case scenarios"
- I think that we need to keep a separatelly thawed structure in L1 for a sole
purpose of unsafe => 1 calls; if not, the "feature" described in comment #4
would be broken; also, there is no need to do 2nd thaw immediately / in
advance, it may be never used e.g. if all get_from_cache() calls for a given
key are of the "safe" kind (and a lot of scripts are doing just one single
call) - it's more optimal to delay 2nd thaw to the moment when the 1st "unsafe"
call is being made;
if the 1st call is "unsafe", there would be only one thaw
- I did s/{value}/{thawed}/ - there are too many $value variables in that code,
it's hard to distiguish what is what

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