kicad-developers team mailing list archive

[Bernhard Stegmaier <stegmaier@xxxxxxxxxxxxx>]

Hi,

I got a trace and that doesn’t look very different to what e.g. I see on my machine.

One observation is that we are spending almost 1/3 of the drawing time in drawing the grid.
Unfortunately, on OSX wxWidgets DrawPoint() has no native expression, so it is mapped to drawing a line (x, y, x+1, y+1).
So, we draw many very small lines here…
Scrolling with deactivated grid is by far more smooth/snappy, so improving this would definitely help.

I’ll try if some other basic drawing primitive like rectangle or circle or a different pen might result in better performance (I don’t have very much hope in that).

Another idea:
In GAL canvas grid is already drawn as lines and not as dots as in legacy.
Personally, I also like dots as grid better but as a last resort to improve performance any objections about drawing grid as lines also in default canvas (maybe only on OSX)?

And:
In the DrawGrid() code there has been some Blit-Code to draw/copy the grid which obviously didn’t work according to the comment and was removed somewhen (comment is still there…).
Does anybody know why it was not used or didn’t work and would this probably be another alternative?


Regards,
Bernhard


> On 22 Dec 2015, at 21:41, Chris Pavlina <pavlina.chris@xxxxxxxxx> wrote:
> 
> He can install xcode but isn't familiar with it (does embedded development, but not PC) - is this something that would be relatively easy to do for an otherwise computer-literate non-developer?
> 
> On Dec 22, 2015 4:57 AM, "Bernhard Stegmaier" <stegmaier@xxxxxxxxxxxxx <mailto:stegmaier@xxxxxxxxxxxxx>> wrote:
> I did the profiling Adam mentioned and found that dotted/dashed lines didn’t work well in pcbnew and footprint editor.
> This was fixed in rev6278.
> 
> How complex is the project?
> Compared to some of the demo projects?
> 
> Does he have Xcode on his machine?
> I could provide some hints on how to make a profiling trace of his slow use-cases… I think it can be saved and probably I could analyse a bit.
> 
> 
> Regards,
> Bernhard
> 
> > On 22 Dec 2015, at 01:20, Chris Pavlina <pavlina.chris@xxxxxxxxx <mailto:pavlina.chris@xxxxxxxxx>> wrote:
> >
> > Apparently even eeschema is unusable on this particular setup. :(
> >
> > On Mon, Dec 21, 2015 at 06:08:44PM -0600, Adam Wolf wrote:
> >> IIRC, OS X doesn't have an XOR draw mode.
> >>
> >> After a certain size PCB, PCBnew legacy graphics on OS X is unusable.  This
> >> size is much lower than it is in Linux, on the same hardware.
> >>
> >> Someone awesome on the list, I forget who right now, did some profiling and
> >> fixed a wx issue that was causing some slowness, and I used the profiler a
> >> bit more after that and was unable to find substantial increases with the
> >> same technique.
> >>
> >> Adam Wolf
> >>
> >> Okay, this is just a quick call for information for now, not sure if this
> >> is a known issue (and I'm relaying from a friend, don't have one here to
> >> test) - have any OSX users noticed some severe slowness in the legacy
> >> graphics (including eeschema) while panning, zooming, and picking up and
> >> moving objects? This is on a relatively recent (2014, IIRC, and another
> >> 2015) Macbook. Apparently it's borderline unusable.
> >>
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