[LUCENE-1043] Speedup merging of stored fields when field mapping "matches"

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.2
• Fix Version/s: 2.3
• Component/s: core/index
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Michael McCandless
• Created: 02/Nov/07 18:29
• Updated: 28/Aug/22 11:42
• Resolved: 08/Nov/07 11:08

Description

Robert Engels suggested the following idea, here:

http://www.gossamer-threads.com/lists/lucene/java-dev/54217

When merging in the stored fields from a segment, if the field name ->
number mapping is identical then we can simply bulk copy the entire
entry for the document rather than re-interpreting and then re-writing
the actual stored fields.

I've pulled the code from the above thread and got it working on the
current trunk.