GitHub user chenghao-intel opened a pull request:
https://github.com/apache/spark/pull/679
[SQL] Fix Performance Issue in data type casting
Using lazy val object instead of function in the class Cast, which improved
the performance nearly by 2X in my local micro-benchmark.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/chenghao-intel/spark fix_type_casting
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/679.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 #679
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commit 71b090256f269dae172b489c5be39bdbde7c071a
Author: Cheng Hao <[email protected]>
Date: 2014-05-07T08:22:17Z
using lazy val object instead of function for data type casting
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