Shinichiro Abe created SOLR-6889:
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Summary: debug, highlight with parallel streams
Key: SOLR-6889
URL: https://issues.apache.org/jira/browse/SOLR-6889
Project: Solr
Issue Type: Improvement
Affects Versions: Trunk
Reporter: Shinichiro Abe
I think we could gain search performance a little bit using
Stream.parallel().forEach()~ which has processors awareness via f/j framework
under the hood.
Especially it would affect docList's for-loop processes, e.g. debugging,
highlighting.
It seems to me that this improvement is effective for many CPUs environment.
My test condition:
1. Core i5(2core 4thead), standalone Solr.
2. q=日本&debug=true&hl=true, other parameters are
[here|https://github.com/anond2/simplesearch/blob/master/conf/solrconfig.xml#L836].
3. 7171 hits / 12000 docs(taken from ja.wikipedia dump)
4. compared to trunk, parallel streams are faster a little.
My query execution results(QTime):
{noformat}
== rows=10 ==
trunk patch
1st 236 146
2nd 179 100
3rd 79 72
4th 75 53
5th 91 80
== rows=50 ==
trunk patch
1st 485 325
2nd 225 243
3rd 199 151
4th 168 127
5th 149 118
== rows=100 ==
trunk patch
1st 948 607
2nd 472 390
3rd 237 201
4th 256 200
5th 224 178
== rows=500 ==
trunk patch
1st 3248 2826
2nd 1545 1067
3rd 1563 801
4th 1551 816
5th 1452 777
{noformat}
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