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From "Michael McCandless (JIRA)" <>
Subject [jira] Created: (LUCENE-2492) Make PulsingCodec (wrapping StandardCodec) the default codec
Date Mon, 07 Jun 2010 10:47:55 GMT
Make PulsingCodec (wrapping StandardCodec) the default codec

                 Key: LUCENE-2492
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Index
    Affects Versions: 4.0
            Reporter: Michael McCandless
            Assignee: Michael McCandless
             Fix For: 4.0

PulsingCodec can provides good gains, by inlining the postings into the terms dict for rare
terms.  This is especially helpful for primary key like fields, since every term is rare and
batch lookups are common (see
for a simple perf test), but it should also be a gain for ordinary fields, thanks to Zipf's

I think we should make it the default....

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