[Koha-bugs] [Bug 20664] Optimize retrieval of biblio and item data

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=20664

Ere Maijala <ere.maijala at helsinki.fi> changed:

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--- Comment #22 from Ere Maijala <ere.maijala at helsinki.fi> ---
Created attachment 79225
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=79225&action=edit
Bug 20664: Optimize retrieval of biblio and item data

Optimizes embedding of item data in MARC and fixes several bottlenecks
encountered while profiling OAI-PMH and exporting of records. There are two
ways this is accomplished:

1.) Create optimized method for fetching item fields for MARC embedding.
2.) Use the cache service more and where repeated calls are made.

Test plan:

1.) Before applying the patch, time an export_records.pl run for a set of
biblios that also have items. Run it a couple of times to account for initial
slowness and possible fluctuations. For example:

time misc/export_records.pl --record-type bibs --starting_biblionumber 960000
--ending_biblionumber 965000 --format xml --filename unoptimized.xml

2.) Apply the patch.

3.) Time the export process again with a different output file:

time misc/export_records.pl --record-type bibs --starting_biblionumber 960000
--ending_biblionumber 965000 --format xml --filename optimized.xml

4.) Verify that the optimized process is faster.

5.) Compare the resulting export files to make sure they're identical:

diff -u unoptimized.xml optimized.xml

6.) Run tests to verify that they still pass:

prove t/db_dependent/Items.t

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