Daniel Becker has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/13807 )

Change subject: IMPALA-8741: Speed up bit unpacking by vectorisation
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Patch Set 15:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/13807/4/be/src/util/bit-packing-vectorized.h
File be/src/util/bit-packing-vectorized.h:

PS4:
> I'll discuss it with other team members also.
Csaba prefers the second option.

I've partly ported the script to Python 2.6, but it requires some effort as 
some features I used in the script are not available in Python 2.6. Some of 
them are available as installable packages, but I guess installing them would 
complicate the build process too much.

Another argument in favour of the second approach is that if the generated code 
is checked in, it is possible to read it on Github and understand the code 
without having to build it.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I9e452a547973778bbd8d768c608e1a32e948f947
Gerrit-Change-Number: 13807
Gerrit-PatchSet: 15
Gerrit-Owner: Daniel Becker <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Daniel Becker <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-Comment-Date: Tue, 23 Jul 2019 10:07:45 +0000
Gerrit-HasComments: Yes

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