[Sugar-devel] Web activity example that uses html5 canvas

[Gonzalo Odiard]

Interesting. Thanks James

In the past, we had performance problems with the "nice" clock.
Should be good implement it on javascript, to see how smart is the canvas.

Gonzalo


On Tue, Apr 30, 2013 at 9:55 PM, James Cameron <quozl at laptop.org> wrote:

> Summary: this Clock activity consumes significantly less CPU on XO-4
> and XO-1 when implemented in Javascript.
>
> On Tue, Apr 30, 2013 at 08:42:18PM -0300, Manuel Qui?ones wrote:
> > 2013/4/30 James Cameron <quozl at laptop.org>:
> > > On Tue, Apr 30, 2013 at 08:58:50AM -0300, Manuel Qui?ones wrote:
> > >> Should work on other browsers now:
> > >>
> > >> http://manuq.github.io/clockjs/
> > >
> > > Agreed, works well, reasonably low CPU utilisation.  Thanks.
> >
> > Excellent.  Thanks for checking the CPU consumption.
>
> Here's a more detailed check.  Method is to run only the activity
> under test, and use the serial port to run the Linux top command
> configured for a 30 second sample time.
>
> --
>
> On XO-4 using 13.1.0:
>
> - using Javascript, the Browse-149 process consumes 7.5% CPU, and the
>   X process 3.2% CPU.  Total of 10.7% CPU.
>
> - not using Javascript, the Clock-12 process consumes 2.7% CPU, and
>   the X process 13.2% CPU.  Total of 15.9% CPU.
>
> (Were there any changes to the algorithm?  e.g. is the Sugar activity
> drawing more frequently than the Javascript activity?)
>
> --
>
> On XO-1 using 13.2.0, build 32004o0,
>
> - using Javascript, the Browse-149.2 process consumes 9.8%, the X
>   process 7.4%, a total of 17.2%,
>
> - not using Javascript, the Clock-12 process consumes 10.4% and X
>   process consumes 18.4%, a total of 30.8%.
>
> --
>
> On XO-1 using 11.3.0, build 883,
>
> - using Javascript, the Browse 129.1 does not render the script,
>
> - not using Javascript, the Clock-6 consumes 7.0%, and X consumed
>   9.0%, a total of 16%.
>
> --
> James Cameron
> http://quozl.linux.org.au/
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