[Koha-bugs] [Bug 30789] Improve performance of AddBiblio

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=30789

--- Comment #1 from Nick Clemens <nick at bywatersolutions.com> ---
Created attachment 135071
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=135071&action=edit
Bug 30789: Improve performance of AddBiblio

AddBiblio calls TransformMarcRecordToKoha. We are only interested in getting
biblio and biblioitems info, so we can pass 'no_items' to save some field
lookups

Additionally we can pass the subfield structure we have already fetched into
the subroutine
TransformMarcToKohaOneField

Testing with NYTProf I saw a reduction of ~6 seconds when importing ~400 bibs
and ~1000 items
i.e. I exported and imported the sample data (after removing duplicate 010 from
record 72)

To test:
1 - Stage and import some records
2 - Confirm it works the same before and after patch

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