Details
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Improvement
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Status: Closed
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Major
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Resolution: Fixed
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4.0-ALPHA
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None
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New, Patch Available
Description
Since we moved the bulk reading into the codec ie. make all bulk reading codec private in LUCENE-3584 we have seen some performance regression on different CPUs. I tried to optimize the implementation to make it more eligible for runtime optimizations, tried to make loops JIT friendly by moving out branches where I can, minimize member access in all loops, use final members where possible and specialize the two common cases With & Without LiveDocs.
I will attache a patch and my benchmark results in a minute.