[bug #68281] Stream MAT v7 compression directly to output files

"Dmitri A. Sergatskov" <[email protected]> Sat, 25 Apr 2026 13:43:52 -0400 (EDT)

Newsgroups	gmane.comp.gnu.octave.bugs
Message-ID	<[email protected]>

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URL:
  <https://savannah.gnu.org/bugs/?68281>

                 Summary: Stream MAT v7 compression directly to output files
                   Group: GNU Octave
               Submitter: dasergatskov
               Submitted: Sat 25 Apr 2026 05:43:44 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Performance
                  Status: None
             Assigned to: None
         Originator Name:
        Originator Email:
             Open/Closed: Open
         Discussion Lock: Unlocked
                 Release: dev
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


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Date: Sat 25 Apr 2026 05:43:44 PM UTC By: Dmitri A. Sergatskov <dasergatskov>
Currently, when saving to Mat-7 siles, Octave writes to temporary buffer first
and then pipe it to compressor. For large data that introduces a significant
delay. One should be able to stream compressed data directly to output files.


I will post a patch that does that shortly.

Dmitri.
-- 








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