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https://issues.apache.org/jira/browse/LUCENE-8699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16772911#comment-16772911
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ASF subversion and git services commented on LUCENE-8699:
---------------------------------------------------------
Commit 66d4840860230613881aa42cf5837478d156f6e6 in lucene-solr's branch
refs/heads/branch_8x from Ignacio Vera
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=66d4840 ]
LUCENE-8699: Change HeapPointWriter to use a single byte array instead to a list
of byte arrays. In addition a new interface PointValue is added to abstract
out
the different formats between offline and on-heap writers.
> Use fixed byte array in HeapPointWriter
> ---------------------------------------
>
> Key: LUCENE-8699
> URL: https://issues.apache.org/jira/browse/LUCENE-8699
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Ignacio Vera
> Priority: Major
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
>
> {heapPointWriter} is always created with the same init size and max size. It
> might make sense to change the implementation to use a byte array instead of
> a growable structure as it has now. This seems to improve performance:
>
> ||Approach||Index time (sec): Dev||Index Time (sec): Base||Index Time:
> Diff||Force merge time (sec): Dev||Force Merge time (sec): Base||Force Merge
> Time: Diff||Index size (GB): Dev||Index size (GB): Base||Index Size:
> Diff||Reader heap (MB): Dev||Reader heap (MB): Base||Reader heap: Diff||
> |points|122.1s|147.0s|-17%|51.9s|70.5s|-26%|0.55|0.55|0%|1.57|1.57|0%|
> |shapes|211.1s|244.6s|-14%|121.1s|135.0s|-10%|1.29|1.29|0%|1.61|1.61|0%|
> |geo3d|154.2s|186.6s|-17%|63.4s|82.8s|-23%|0.75|0.75|0%|1.58|1.58|0%|
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