Re: Performance hit with --enable-atomic-refcount

[Dmitri A. Sergatskov]

​octave-3.8.2-rc1 Fedora 20, ​

AMD FX(tm)-8350

​ (8-core, 4GHz),
​

gcc version 4.8.2 20131212 (Red Hat 4.8.2-7) (GCC)

Enable-atomic-refcount
No gui:

 a = 1; b = 1; tic; for i=1:1000; for j=1:1000; a = a + b; end; end; toc
Elapsed time is 2.553 seconds.

force-gui
a = 1; b = 1; tic; for i=1:1000; for j=1:1000; a = a + b; end; end; toc
Elapsed time is 3.02133 seconds.

​Disable-atomic-refcount

No gui:
a = 1; b = 1; tic; for i=1:1000; for j=1:1000; a = a + b; end; end; toc
Elapsed time is 1.45362 seconds.

Gui:

a = 1; b = 1; tic; for i=1:1000; for j=1:1000; a = a + b; end; end; toc
Elapsed time is 1.69454 seconds.

FYI.

Dmitri.
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