GitHub user parthchandra opened a pull request:
https://github.com/apache/drill/pull/781
DRILL-5351: Minimize bounds checking in var len vectors for Parquet
reader
Two changes in var len vectors:
1) Instead of checking to see if we need to realloc for every setSafe call,
let the write fail and catch the exception. The exception, though expensive,
will happen very rarely.
2) Call fillEmpties only if there are empty values to fill.
This saves a bunch of CPU on every setSafe call.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/parthchandra/drill DRILL-5351
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/781.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 #781
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commit 57869496526a43351575d0f4879d2ac28fe973d4
Author: Parth Chandra <pchan...@maprtech.com>
Date: 2017-02-11T01:40:25Z
DRILL-5351: Minimize bounds checking in var len vectors for Parquet
reader
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