Re: [Audacity-devel] Idle and UpdateMenus

[Dominic M. <do...@mi...>]

Otto Wyss wrote:
>>I discovered that 80% of the idle time was spent in UpdateMenus.
>>I refactored the code slightly so that it now calls UpdateMenus
>>manually whenever PushState or FixScrollbars is called, and
>>otherwise no more often than once per second.  This brought
>>idle CPU usage down to nearly zero on Linux.  Hopefully it will
>>help on OS X, too.
> 
> Under Windows showing an empty project uses now around 10-15% of my
> K6-III+ 500MHz. It's much better now.

Great.  We should be able to get it down, especially if Brian has
a chance to streamline some of his code.  But 10-15% is fine for
this beta release.

> When I start recording CPU usage goes up again and recording is still
> unusable. Using the pause or stop button is impossible, I have to kill
> audacity with CTRL-ALT-DEL.

Temporarily, just look for the following lines in TrackPanel.cpp,
and modify them to your liking:

       if (gAudioIO->GetNumCaptureChannels()) {
          if ((mTimeCount % 5) == 0)
             p->RedrawProject();
       }

Changing the "5" to a "10" will make it update the screen half as
often, for example.  Let me know what the optimal value for you
ends up being.

- Dominic

> O. Wyss
> 
> 
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