https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=28702

Nick Clemens (kidclamp) <[email protected]> changed:

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--- Comment #14 from Nick Clemens (kidclamp) <[email protected]> ---
Created attachment 186070
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=186070&action=edit
Bug 28702: Reduce DB lookups in buildKohaItemsNamespace

This patch moves the prefetch to current_branchtransfers and uses the
prefetched reserves
and transfers to reduce the number of lookups from the DB

To test:
1 - Perform a search on the OPAC
2 - Add the results to a list
3 - Load the list several times and use developer tools (F12) to view the time
to load in the network tab
4 - Repeat a search several times and use developer tools (F12) to view the
time to load in the network tab
5 - Record the times noted above
6 - Find or create a record with many items, biblionumber 3 in my example
7 - on the command line:
    export DBIC_TRACE=1
    perl -e 'use C4::XSLT; my $i = C4::XSLT::buildKohaItemsNamespace( 3 );'
    note the lookups in reserves and transfers
8 - Apply patch
9 - Repeat 7 and note less lookups
10 - Repeat the search and list view and compare times to before the patch
11 - prove -v t/db_dependent/XSLT.t

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