Petr Kobalíček wrote:
>
> Hi all,
>
> I have taken a note that keyboard handling in qooxdoo is slow. When I
> press a key, my 1.6Ghz processor runs at 100% speed even that
> application is doing nothing. This also happens to mouse moving in
> browser client area.
>
I have found the same. In TreeVirtual the following event was consuming
excessive CPU
qx/ui/table/pane/Scroller.js:
this._paneClipper.addEventListener("mousemove", this._onmousemovePane, this)
I added the following call to disable this functionality which seems to help
myTree.setFocusCellOnMouseMove(false);
Not sure if the same thing happens in the Table (since TreeVirtual extends
Table) - I would assume it does. Because the TreeVirtual is doing a lot more
layout stuff - it is probably more evident.
I have also run into speed issues using keyboard navigation on forms. If the
form has a complex layout, qooxdoo spends a lot of time trying to determine
the next/previous control when you hit the tab key. If you explicitly set
the tabIndex order for all controls the problem goes away.
Don't know if this helps...
Petr Kobalíček wrote:
>
>
> I have not problem in 100% cpu usage, but for example moving cursor in
> table, tree or list is also slow due to this issue. Is there some
> chance that this will be better in the future or it's caused by
> universal qooxdoo event handling with no chance to be faster ?
>
> I'm also wrote game in javascript (using canvas or dom) and I wanted
> to reuse my qooxdoo experiences to give it good user interface (and
> implementation of editor) in qooxdoo, but my discovery was that I
> can't use it due to speed issues (but this is not qooxdoo fault, I
> just wanted to use it in area that's not created for).
>
> If there are any tips related to event dispatching speed in qooxdoo I
> would like to read them.
>
> Cheers
> - Petr
>
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