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https://issues.apache.org/jira/browse/LUCENE-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12567326#action_12567326
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Michael McCandless commented on LUCENE-1172:
--------------------------------------------
The above numbers were with the full docs from Wikipedia. I expect
the optimization to be more effective with smaller docs so I ran test
to index first 10 million small (~ 100 characters) Wikpedia docs.
Trunk took 257.5 sec (best of 3) and patch took 246.9 sec (best of 3)
= 4.1% speedup.
Here's the alg I'm running:
analyzer=org.apache.lucene.analysis.standard.StandardAnalyzer
doc.maker=org.apache.lucene.benchmark.byTask.feeds.LineDocMaker
docs.file=/Volumes/External/lucene/wikifull100.txt
doc.stored = true
doc.term.vector = true
doc.add.log.step=20000
directory=FSDirectory
autocommit=false
compound=false
ram.flush.mb=64
{ "Rounds"
ResetSystemErase
{ "BuildIndex"
-CreateIndex
{ "AddDocs" AddDoc > : 10000000
-CloseIndex
}
NewRound
} : 3
RepSumByPrefRound BuildIndex
> Small speedups to DocumentsWriter
> ---------------------------------
>
> Key: LUCENE-1172
> URL: https://issues.apache.org/jira/browse/LUCENE-1172
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.3
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.4
>
> Attachments: LUCENE-1172.patch
>
>
> Some small fixes that I found while profiling indexing Wikipedia,
> mainly using our own quickSort instead of Arrays.sort.
> Testing first 200K docs of Wikipedia shows a speedup from 274.6
> seconds to 270.2 seconds.
> I'll commit in a day or two.
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