[Sugar-devel] performance issues with Easeljs

[Gonzalo Odiard]

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

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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>


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*Gonzalo Odiard*
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