[Koha-bugs] [Bug 35921] Improve perfs of acqui-home.pl when there are many budgets

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=35921

--- Comment #1 from Julian Maurice <julian.maurice at biblibre.com> ---
Created attachment 161546
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=161546&action=edit
Bug 35921: Improve perfs of acqui-home.pl when there are many budgets

When there are a lot of budgets with the same owner, most of the time of
acqui-home.pl is spent loading the same patron over and over.

This patch makes sure each borrower is loaded only once.

Test plan:
0. Do not apply the patch yet
1. Create a thousand budgets with the following command (make sure the
   budget_owner_id is an existing borrowernumber):
       perl -MKoha::Database -e '
           my $schema = Koha::Database->schema;
           my $period = $schema->resultset("Aqbudgetperiod")->create({
               budget_period_startdate => "2000-01-01",
               budget_period_enddate => "2999-12-31"
           });
           $schema->resultset("Aqbudget")->create({
               budget_owner_id => 1,
               budget_period_id => $period->id
           }) for (1..1000)
       '
2. Measure the time it takes to load acqui/acqui-home.pl (do it several
   times and keep the average time)
3. Apply the patch
4. Repeat step 2

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