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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-11529) Work with json module takes too long
Date Fri, 29 May 2015 22:02:21 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-11529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14565513#comment-14565513
] 

Hudson commented on AMBARI-11529:
---------------------------------

SUCCESS: Integrated in Ambari-trunk-Commit #2751 (See [https://builds.apache.org/job/Ambari-trunk-Commit/2751/])
AMBARI-11529. Work with json module takes too long - fixed rat failure (aonishuk) (aonishuk:
http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=e5339f3cd861c8891c2c976b8a33b0a003f85233)
* pom.xml


> Work with json module takes too long
> ------------------------------------
>
>                 Key: AMBARI-11529
>                 URL: https://issues.apache.org/jira/browse/AMBARI-11529
>             Project: Ambari
>          Issue Type: Bug
>            Reporter: Andrew Onischuk
>            Assignee: Andrew Onischuk
>             Fix For: 2.1.0
>
>
> Due to profiling below, from 420 seconds of deploy json.load and json.loads
> take 40 seconds (which even doesn't include working with json in ambari-agent
> itself, only script):
>     
>     
>           204    0.007    0.000   20.182    0.099 __init__.py:243(load)
>           351    0.002    0.000   17.894    0.051 __init__.py:270(loads)
>     
> This is because json module for Python 2.6 is extremety slow. There are
> benchmark for it on here:  
> <http://stackoverflow.com/questions/706101/python-json-decoding-performance>
> due to it simplejson is at least ~40 times faster for deserializing.
> Also another thing to do in scope of this jira is to replace inspect module
> usage with os._getframe() which doesn't use realpath function that
> intensively, taking away 10 more seconds.
>     
>     
>     30049/21438    1.712    0.000   10.873    0.001 posixpath.py:354(realpath)
>     



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