[LUCENE-6183] Avoid re-compression on stored fields merge

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.1, 6.0
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Robert Muir
• Created: 15/Jan/15 08:45
• Updated: 28/Aug/22 14:23
• Resolved: 15/Jan/15 21:33

Description

We removed this optimization before, it didnt really work right because it required things to be "aligned".

But I think we can do it simpler and safer. This recompression is a big cpu hog in merge, and limits our options compression-wise (especially ones like LZ4-HC that are only slower at write-time).