[Octave-patch-tracker] [patch #10160] interpreter: Object pool for scalars

[Petter Tomner]

URL:
  <https://savannah.gnu.org/patch/?10160>

                 Summary: interpreter: Object pool for scalars
                 Project: GNU Octave
            Submitted by: petter
            Submitted on: Sat 11 Dec 2021 01:29:08 AM UTC
                Category: Core : new feature
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hi!

I have made a patch that adds an object pool for octave_base_scalar and
its derived classes, to decrease malloc and free usage.

Code like:

function i = foo ()
        tic;
        for i = 1:100000
                i = 1+2+3+4+5+6+7;
        end
        toc;
end


has a speed increase of about 13% on my machine and the amount of mallocs 
decreases from 1,1 million to 440 000.

The patch works fine on my x64 Debian machine, but should probably be tested 
on a Windows build, because C++ thread_local support is kinda quirky.

The object pool size is set to 8, but could probably be tuned somewhat.



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File Attachments:


-------------------------------------------------------
Date: Sat 11 Dec 2021 01:29:08 AM UTC  Name: objpool.patch  Size: 7KiB   By:
petter

<http://savannah.gnu.org/patch/download.php?file_id=52481>

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