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From "Johan Stuyts (JIRA)" <>
Subject [jira] Created: (LUCENE-639) [PATCH] Slight performance improvement for readVInt() of IndexInput
Date Fri, 28 Jul 2006 08:32:13 GMT
[PATCH] Slight performance improvement for readVInt() of IndexInput

                 Key: LUCENE-639
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Index
    Affects Versions: 2.0.0
            Reporter: Johan Stuyts
            Priority: Minor
         Attachments: Lucene2ReadVIntPerformance.patch

By unrolling the loop in readVInt() I was able to get a slight, about 1.8 %, performance improvement
for this method. The test program invoked the method over 17 million times on each run.

I ran the performance tests on:
- Windows XP Pro SP2
- Sun JDK 1.5.0_07
- YourKit 5.5.4
- Lucene trunk

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