quickstep-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From hakanmemisoglu <...@git.apache.org>
Subject [GitHub] incubator-quickstep issue #98: QUICKSTEP-53 DateLit improvements
Date Sun, 04 Sep 2016 22:32:56 GMT
Github user hakanmemisoglu commented on the issue:

    https://github.com/apache/incubator-quickstep/pull/98
  
    @zuyu  This will be merged after @hbdeshmukh's changes. Since we are use rebasing, I don't
think it will be a problem. 
    For the efficiency part:
    1-) Using new comparison operators obviously are faster than old counterparts using if
else statements. (Of course the overall effect might not be fast as we expected in the TPCH
queries.)  Thank you.
    2-) No matter why TypedValue is used in query processing , the cutting the size of struct
representation by 50% improves the memory usage:
     a-)  A page can contain 50% more values.
     b-) Recent x86 architectures favor using the values 32 bits or 64 bits, not 48 bits.


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---

Mime
View raw message