GitHub user heary-cao opened a pull request:
https://github.com/apache/spark/pull/21968
[SPARK-24999][SQL]Reduce unnecessary 'new' memory operations
## What changes were proposed in this pull request?
This PR is to solve the CodeGen code generated by fast hash, and there is
no need to apply for a block of memory for every new entry, because unsafeRow's
memory can be reused.
## How was this patch tested?
the existed test cases.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/heary-cao/spark updateNewMemory
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21968.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 #21968
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commit c31597272c10c695d74a7a497ee76fd310026cfd
Author: caoxuewen <cao.xuewen@...>
Date: 2018-08-02T11:50:44Z
Reduce unnecessary 'new' memory operations
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