[ http://issues.apache.org/jira/browse/LUCENE-639?page=comments#action_12425473 ] Johan Stuyts commented on LUCENE-639: -------------------------------------
I don't know what your test method is but a difference of 13-15% is very unlikely. The algorithms are too simple to have such a dramatic effect on performance. It is possible that the test that I provided is flawed. Just let me know what should be changed, and I will update it and rerun the tests. > [PATCH] Slight performance improvement for readVInt() of IndexInput > ------------------------------------------------------------------- > > Key: LUCENE-639 > URL: http://issues.apache.org/jira/browse/LUCENE-639 > Project: Lucene - Java > Issue Type: Improvement > Components: Index > Affects Versions: 2.0.0 > Reporter: Johan Stuyts > Priority: Minor > Attachments: Lucene2ReadVIntPerformance.patch, readVInt performance > results.pdf, ReadVIntPerformanceMain.java > > > 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 -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
