[Sugar-devel] performance issues with Easeljs

[Walter Bender]

On Wed, Jun 22, 2016 at 4:51 PM, Gonzalo Odiard <godiard at gmail.com> wrote:

> Hi Walter,
> Is this a problem with a modern browser, or using it on Android?
>

Browser (Chrome is where I am testing)

>
> Gonzalo
>
> On Wed, Jun 22, 2016 at 5:28 PM, Walter Bender <walter.bender at gmail.com>
> wrote:
>
>> I've been using Easeljs for Turtle Blocks JS and have for the most part
>> been ignoring the performance issues. It works really well for separating
>> the blocks, buttons, etc. from the actual graphics drawn by the Turtle. But
>> I am at the point where the turtle graphics performance is not adequate.
>>
>> The problem is, each time I draw, the accumulated rendering gets redrawn,
>> so over time, the turtle crawls along. Further, even when I first start
>> drawing, the performance is more than 100% slower than drawing directly to
>> the canvas.
>>
>> I'm doing what I think it recommended practice by Easeljs:
>>
>> turtleCanvas = new createjs.Shape();
>> stage.addChild(turtleCanvas);
>>
>> various calls of the sort:
>>
>> turtleCanvas.graphics.moveTo
>> turtleCanvas.grpahics.lineTo
>>
>> I've trted using cache to cache the shape, but that seems to be even
>> slower.
>>
>> Just writing to the canvas context is much faster, but I don't know how
>> to combine the two worlds.
>>
>> Any suggestions?
>>
>> The code in question is in turtle.js in
>> github.com/walterbender/turtleblocksjs/js
>>
>> -walter
>>
>> --
>> Walter Bender
>> Sugar Labs
>> http://www.sugarlabs.org
>> <http://www.sugarlabs.org>
>>
>> _______________________________________________
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>> Sugar-devel at lists.sugarlabs.org
>> http://lists.sugarlabs.org/listinfo/sugar-devel
>>
>>
>
>
> --
> [image: photo]
> *Gonzalo Odiard*
> Lider de proyecto
> tel.: 4210-7748 | www.trinom.io    Av Calchaqui 4936· 2do Piso. Quilmes
> <http://www.facebook.com/trinomiosrl>
> <https://www.linkedin.com/company/trinom-io>
>
>


-- 
Walter Bender
Sugar Labs
http://www.sugarlabs.org
<http://www.sugarlabs.org>
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