GitHub user chenghao-intel opened a pull request:
https://github.com/apache/spark/pull/2155
[SPARK-3198] [SQL] Remove the TreeNode.id
Thus id property of the TreeNode API does save time in a faster way to
compare 2 TreeNodes, it is kind of performance bottleneck during the expression
object creation in a multi-threading env (because of the memory barrier).
Fortunately, the tree node comparison only happen once in master, so even
we remove it, the entire performance will not be affected.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/chenghao-intel/spark treenode
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2155.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 #2155
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commit bec42d23fa6d3c3f956a1fd291d76e0919daf7d7
Author: Cheng Hao <[email protected]>
Date: 2014-08-27T05:39:03Z
Remove the TreeNode.id
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