[Octave-patch-tracker] [patch #8066] speedup of strjoin

[anonymous]

URL:
  <http://savannah.gnu.org/patch/?8066>

                 Summary: speedup of strjoin
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Di 04 Jun 2013 17:51:27 UTC
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any

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Details:



> % short string, many cells
> a = {'a'};
> b=repmat(a,1,1e5);
> tic
> c1=strjoin(b);
> toc
Elapsed time is 0.363541 seconds.

> tic
> c2=[[b(:).' ; repmat({' '},1,numel(b))]{:}](1:end-1);
> toc
Elapsed time is 0.3507609 seconds.


> % long string, less cells
> a={repmat('a',1,1e5)};
> b=repmat(a,1,1e3);
> tic
> c1=strjoin(b);
> toc
Elapsed time is 1.692134 seconds.

> tic
> c2=[[b(:).' ; repmat({' '},1,numel(b))]{:}](1:end-1);
> toc
Elapsed time is 0.2909841537 seconds.




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File Attachments:


-------------------------------------------------------
Date: Di 04 Jun 2013 17:51:27 UTC  Name: strjoin.patch  Size: 601B   By: None

<http://savannah.gnu.org/patch/download.php?file_id=28264>

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Reply to this item at:

  <http://savannah.gnu.org/patch/?8066>

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