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https://issues.apache.org/jira/browse/ARROW-7784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17116238#comment-17116238
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Wes McKinney commented on ARROW-7784:
-------------------------------------
"QuadraticSpaceMyersDiff" is being instantiated for every Arrow type. Given
that this code is not performance sensitive, I would suggest refactoring this
code to only instantiate a single implementation of the Diff algorithm (rather
than 25+ instantiations) and where relevant introduce a virtual interface for
interacting with values in different-type arrays.
> [C++] diff.cc is extremely slow to compile
> ------------------------------------------
>
> Key: ARROW-7784
> URL: https://issues.apache.org/jira/browse/ARROW-7784
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Antoine Pitrou
> Priority: Minor
> Fix For: 1.0.0
>
>
> This comes up especially when doing an optimized build. {{diff.cc}} is always
> enabled even if all components are disabled, and it takes multiple seconds to
> compile.
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