GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/13809
[SPARK-16104][SQL] Do not creaate CSV writer object for every flush when
writing
## What changes were proposed in this pull request?
This PR let `CsvWriter` object is not created for each time but able to be
reused. This way was taken after from JSON data source.
Original `CsvWriter` was being created for each row but it was enhanced in
https://github.com/apache/spark/pull/13229. However, it still creates
`CsvWriter` object for each `flush()` in `LineCsvWriter`. It seems it does not
have to close the object and re-create every flush.
It follows the original logic as it is but `CsvWriter` is reused by
reseting `CharArrayWriter`.
## How was this patch tested?
Existing tests should cover this.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark write-perf
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13809.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #13809
----
commit a62a26fe52fedcdb98e4a9d8cd258681f81b6864
Author: hyukjinkwon <gurwls...@gmail.com>
Date: 2016-06-21T12:34:32Z
Do not creaate CSV writer object for every flush when writing
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