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From "Matthias Boehm (JIRA)" <>
Subject [jira] [Closed] (SYSTEMML-1888) Remove parfor rewrite update-in-place for intermediates
Date Fri, 08 Sep 2017 19:30:00 GMT


Matthias Boehm closed SYSTEMML-1888.

> Remove parfor rewrite update-in-place for intermediates
> -------------------------------------------------------
>                 Key: SYSTEMML-1888
>                 URL:
>             Project: SystemML
>          Issue Type: Sub-task
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 0.15
> This task aims to remove the brittle parfor rewrite on update-in-place for intermediates.
Since meanwhile, we apply update in-place also for any for loop, the performance impact of
this rewrite is not critical. 
> The issues of this rewrite include poor asymptotic behavior in the number of nodes in
the parfor program and in the number of candidates, as well as brittle comparisons based on
hop names and line numbers. In order to not stall the 0.15 release, we remove this rewrite
for now and reimplement it for the 1.0 release.

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