Details
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Improvement
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Status: Open
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Major
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Resolution: Unresolved
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6.0
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None
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None
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None
Description
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.
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):
== 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