[Octave-patch-tracker] [patch #10222] interpreter: Object pool for scalars and stack frames

[John W. Eaton]

Follow-up Comment #2, patch #10222 (project octave):

This change was also posted in patch #10160 with the following info in the
original submission:


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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