GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/20992
[SPARK-23779][SQL] TaskMemoryManager and UnsafeSorter related classes use
MemoryBlock
## What changes were proposed in this pull request?
This PR tries to use `MemoryBlock` in `TaskMemoryManager` and
`UnsafeSorter` related classes. There are two advantages to use `MemoryBlock`.
1. Has clean API calls rather than using a Java array or `PlatformMemory`
2. Improve runtime performance of memory access instead of using `Object`
with `Platform.get/put...`.
## How was this patch tested?
Used existing UTs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-23779
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20992.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 #20992
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commit 64c5d23c269885a4d90346ef5e1efcfcd0748511
Author: Kazuaki Ishizaki <ishizaki@...>
Date: 2018-04-06T07:16:31Z
initial commit
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