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https://issues.apache.org/jira/browse/ARROW-1712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16336728#comment-16336728
]
ASF GitHub Bot commented on ARROW-1712:
---------------------------------------
kou commented on issue #1481: ARROW-1712: [C++] Add method to BinaryBuilder to
reserve space for value data
URL: https://github.com/apache/arrow/pull/1481#issuecomment-359993584
@wesm I think that it's a network problem:
https://travis-ci.org/apache/arrow/jobs/332472808#L552
> E: Failed to fetch
http://us-central1.gce.archive.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages.gz
Hash Sum mismatch
We will be able to reduce the case by changing the `apt-get update` command
line with the following:
```bash
for i in {1..3}; do
sudo -E apt-get -yq update &>> ~/apt-get-update.log && break
done
```
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> [C++] Add method to BinaryBuilder to reserve space for value data
> -----------------------------------------------------------------
>
> Key: ARROW-1712
> URL: https://issues.apache.org/jira/browse/ARROW-1712
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Panchen Xue
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> The {{Resize}} and {{Reserve}} methods only reserve space for the value
> offsets. When building binary/string arrays with a known size (or some
> reasonable estimate), it would be more efficient to reserve once at the
> beginning to prevent internal reallocations
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