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Regards,
Glenn
From: Himanshu Mohan <himanshu.mo...@aexp.com.INVALID>
To: "dev@systemml.apache.org" <dev@systemml.apache.org>
Date: 09/08/2017 09:53 PM
Subject: RE: [jira] [Updated] (SYSTEMML-1591) Improve efficiency
sparse-unsafe cellwise operations
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Himanshu
-----Original Message-----
From: Glenn Weidner (JIRA) [mailto:j...@apache.org]
Sent: Saturday, September 09, 2017 6:43 AM
To: iss...@systemml.apache.org
Subject: [jira] [Updated] (SYSTEMML-1591) Improve efficiency sparse-unsafe
cellwise operations
[
https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_SYSTEMML-2D1591-3Fpage-3Dcom.atlassian.jira.plugin.system.issuetabpanels-3Aall-2Dtabpanel&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=we2L9Q2NOeniL5PbfdrO3CmQPNy_vnhoDpPDviJpnrU&m=RktQi2xPy3D4v_pydzFm0hBIG_kvTLq1iaesP8jrz_w&s=Yhuz1kJmjUQ1Sl6gPiKJ9jarqyofSJVGJ0MMfc3vAUA&e=
]
Glenn Weidner updated SYSTEMML-1591:
------------------------------------
Fix Version/s: (was: SystemML 1.0)
SystemML 0.15
> Improve efficiency sparse-unsafe cellwise operations
> ----------------------------------------------------
>
> Key: SYSTEMML-1591
> URL:
https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_SYSTEMML-2D1591&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=we2L9Q2NOeniL5PbfdrO3CmQPNy_vnhoDpPDviJpnrU&m=RktQi2xPy3D4v_pydzFm0hBIG_kvTLq1iaesP8jrz_w&s=GkK6Qsfz4YtXzhzfYRYMBQh6SSHBXE6Ps1_qJLAPP1Y&e=
> Project: SystemML
> Issue Type: Sub-task
> Components: Compiler, Runtime
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 0.15
>
>
> For sparse-unsafe cellwise operations, we currently iterate over all
cells and use binary search to access the individual values. This is
unnecessarily inefficient to should be reworked in favor of a sequential
scan with gap handling, which would also allow us to consolidate the
different code paths for sparse-safe and -unsafe operations.
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