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https://issues.apache.org/jira/browse/CALCITE-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15174662#comment-15174662
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Josh Elser commented on CALCITE-1093:
-------------------------------------
Updated the title because I also found at least one place where we can replace
an ArrayList with {{Collections.singletonList}} which will be
(ever-so-slightly) faster.
> Smarter use of List construction
> --------------------------------
>
> Key: CALCITE-1093
> URL: https://issues.apache.org/jira/browse/CALCITE-1093
> Project: Calcite
> Issue Type: Sub-task
> Components: avatica
> Reporter: Josh Elser
> Assignee: Josh Elser
> Fix For: next
>
>
> Through profiling the Avatica server, I noticed that we were spending some
> time resizing an ArrayList while converting {{MetaResultSet}}'s to
> {{ResultSetResponse}}'s. This was because we did not specify the capacity of
> the {{ArrayList<ResultSetResponse>}} during construction despite knowing what
> the capacity needed to be.
> We can avoid some costly array copies if we specify the capacity in the
> constructor.
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