[Octave-bug-tracker] [bug #35400] Performance of in-place operations

[Nicholas Jankowski]

Follow-up Comment #4, bug #35400 (project octave):

Octave 6.4.0 on windows, the results I'm seeing from Rik's test script:

x = x + 1;
Elapsed time is 0.91841 seconds.
x++;
Elapsed time is 0.602464 seconds.
x += 1;
Elapsed time is 0.769149 seconds.

relative timing:

       Rik's c#0    Hartmut's c#2        mine
x+1         100%             100%        100%
x++         106%              43%         66%
x+=         141%              44%         84%


so... it seems the in-place operations have consistently improved since this
was opened in 2012. should this remain open? should it at least be retitled to
indicate the problem is now the x=x+1 performance penalty?  (is that a
problem? should we expect the interpreter to be able to recognize those two
operators and optimize it?)

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