[Laszlo-dev] I am getting 60% cpu usage in swf9/firefox/osx for the test case in LPP-8072 in 4.2

[P T Withington]

I'm going to see if I can replicate your results.

You _do_ have to wait a while for the instantiator to finish, before  
you make your cpu observations.

One possibility is that 4.2 is missing other optimizations that are  
swamping your changes.

On 2009-04-27, at 19:47EDT, Henry Minsky wrote:

> So maybe this is a bad test case; I looked at swfdump of that  
> games.swf
> resource, and  it's a fairly complex vector graphic. So much of the  
> CPU
> usage we see will probably befrom the graphics intensive redraw  
> every frame.
> Perhaps a better test would be views with just simple backgrounds or  
> bitmaps
> or something. Or
> turn on bitmap caching on the resource.
>
>
>
> On Mon, Apr 27, 2009 at 7:40 PM, Henry Minsky <hminsky at laszlosystems.com 
> >wrote:
>
>> Well, actually the CPU usage behavior I see seems to be as follows
>> + If I select the test app, and leave the mouse on top of a soccer  
>> ball
>> image, the CPU stays pegged
>> at 60% forever.
>>
>> + If I command-tab to another OSX  process, the CPU usage goes down  
>> to 15%
>> or so
>>
>> + If I then click back anywhere in the browser window to give it  
>> focus,
>> the CPU still stays at 15%, but if I click the mouse
>> on the app again, it's like it activates the Flash player and CPU  
>> goes up
>> to 60% again.
>>
>> + If I leave the mouse over the blank <window> or the debugger  
>> window,
>> rather than the tiled image array,
>> CPU usage is not as high, more like
>> 20% or so.
>>
>> As an experiment I modified the swf9 kernel to force  
>> mouseEnabled=false on
>> every sprite, but don't see any measureable difference in CPU usage  
>> in that
>> case :-(
>>
>>
>>
>>
>>
>> On Mon, Apr 27, 2009 at 7:07 PM, Henry Minsky <hminsky at laszlosystems.com 
>> >wrote:
>>
>>> Never mind, I think I was not waiting long enough to let the thing  
>>> settle
>>> down.
>>>
>>>
>>> On Mon, Apr 27, 2009 at 7:01 PM, Henry Minsky <hminsky at laszlosystems.com 
>>> >wrote:
>>>
>>>>
>>>> So even with a clean 4.2 branch, if I run the test case in  
>>>> LPP-8072, with
>>>> the wrapping layout with 1100 images and text views, I always get  
>>>> 60%
>>>> cpu usage. It never drops below that when the app has focus. I  
>>>> have the
>>>> thing in non-debug mode, with no
>>>> dev-console. I even modified the swf9 kernel so that mouseEnabled  
>>>> was
>>>> always false on every sprite, but it doesn't seem to make
>>>> any difference, the CPU usage stays pegged at 60%. Strangely, if  
>>>> I am
>>>> running with the debugger, and I move the mouse over
>>>> the debugger window, CPU usage goes down to 22%.If I select the
>>>> debugger's input field for focus, the CPU goes down to 20%.
>>>>
>>>> But leaving the mouse over the tiled graphics shoots up to 60%.
>>>>
>>>> I thought your testing showed a lot lower CPU usage..
>>>>
>>>>
>>>>
>>>> --
>>>> Henry Minsky
>>>> Software Architect
>>>> hminsky at laszlosystems.com
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Henry Minsky
>>> Software Architect
>>> hminsky at laszlosystems.com
>>>
>>>
>>>
>>
>>
>> --
>> Henry Minsky
>> Software Architect
>> hminsky at laszlosystems.com
>>
>>
>>
>
>
> -- 
> Henry Minsky
> Software Architect
> hminsky at laszlosystems.com