http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=6990

             Bug #: 6990
           Summary: TransformKohaToMarc enhancement
    Classification: Unclassified
 Change sponsored?: ---
           Product: Koha
           Version: Rel_3_8
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Architecture, internals, and plumbing
        AssignedTo: gmcha...@gmail.com
        ReportedBy: frede...@tamil.fr
         QAContact: koha-bugs@lists.koha-community.org


TransformKohaToMarc function is called for each biblio and item that has
to be build. This function execute a DB statement for each Koha field
that has to be mapped to a MARC tag/letter. This impact deeply
performances for script like rebuild_zebra, especially since items are
not anymore in bilio records and have to be rebuild on the fly. 

I'm proposing a patch which read Koha field to MARC field mapping just
one time and cache it. My test show a 30% execution time improvement on 
rebuild_zebra.pl script.

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