bugPSPP - Bugs: bug #33260, terrible performance when data...

 
 
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bug #33260: terrible performance when data paged to disk

Submitted by:  Ben Pfaff <blp>
Submitted on:  Sat 07 May 2011 06:10:19 PM UTC  
 
Category: OtherSeverity: 5 - Average
Status: NoneAssigned to: None
Open/Closed: OpenRelease: Before 0.8.0
Effort: 0.00

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Sat 07 May 2011 08:11:35 PM UTC, comment #2:

I pushed some commits that reduce runtime from 2.5 seconds to 1.5 seconds in the terminal UI for this FREQUENCIES test case (with the default workspace size).

The GUI performance is still worse than the terminal UI performance. I'll look into it.

Ben Pfaff <blp>
Project Administrator
Sat 07 May 2011 07:08:38 PM UTC, comment #1:

The problem seems to be that performance for data paged to disk is terrible. If I run "set workspace=100000000." before loading data, then I get much better performance, only about a second or so from either UI for FREQUENCIES runs. It's still perceptibly faster from the terminal UI, but not bad from the GUI.

I'm updating the summary and category accordingly.

Ben Pfaff <blp>
Project Administrator
Sat 07 May 2011 06:10:19 PM UTC, original submission:

Running FREQUENCIES on a data set with about 300,000 cases from the text UI, it takes a few seconds. This is slow (under a second would be what I'd consider "normal"). But running the same FREQUENCIES from the GUI takes over a minute! This needs to get tracked down--it shouldn't be any slower than the terminal UI.

Ben Pfaff <blp>
Project Administrator

 

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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sat 14 May 2011 04:40:00 AM UTCblpReleaseNone=>Before 0.8.0
    Sat 07 May 2011 07:08:38 PM UTCblpCategoryGraphical User Interface=>Other
      Summaryterrible performance in GUI for large data sets=>terrible performance when data paged to disk
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