patchGNU Octave - Patches: patch #7923, Reducing memory usage in perms:...


patch #7923: Reducing memory usage in perms: patch attached

Submitted by:  Arun Giridhar <arungiridhar>
Submitted on:  Mon 14 Jan 2013 09:59:40 PM UTC  
Category: NonePriority: 5 - Normal
Status: DonePrivacy: Public
Assigned to: NoneOpen/Closed: Closed

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Sat 10 Aug 2013 04:54:43 AM UTC, comment #1:

Thanks for this. I just got around to applying the patch here ( I also added your name to the list of contributors. Thanks again.

Rik <rik5>
Project Administrator
Mon 14 Jan 2013 09:59:40 PM UTC, original submission:

I noticed that calling perms(uint8(1:11)) on a system with 4GB memory thrashed the virtual memory even though the input was only type 8-bit integer. I found that perms was using the default type double in a couple of places internally. I have attached a context diff showing two small changes I made to octave/scripts/specfun/perms.m, which reduce memory usage substantially. In particular, perms(uint8(1:11)) now returns without thrashing virtual memory. Hope this helps.

Arun Giridhar <arungiridhar>


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Attach File(s):

Attached Files
file #27264:  perm.diff added by arungiridhar (778B - text/x-patch - Context diff for octave/scripts/specfun/perms.m to reduce internal memory usage)


Depends on the following items: None found

Items that depend on this one: None found


Carbon-Copy List
  • -unavailable- added by rik5 (Posted a comment)
  • -unavailable- added by arungiridhar (Submitted the item)

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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sat 10 Aug 2013 04:54:43 AM UTCrik5StatusNone=>Done
    Mon 14 Jan 2013 09:59:40 PM UTCarungiridharAttached File-=>Added perm.diff, #27264

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