Fastest GUI toolkit?

[Guido van Rossum]

> Gordon Williams <g_will at cyberus.ca> wrote:
> >
> >I have an application where I need to draw many lines fast and repeatedly
> >(an oscilloscope).  The number of lines ranges from about 1000 to 16000. 
> >Currently I have the application using Tkinter but I am finding it too
> >slow.

nascheme at enme.ucalgary.ca (Neil Schemenauer) writes:

> I assume you are using the canvas to draw.  I think it is much
> faster to use Canvas.coords to move the lines then to redraw
> them.  If this approch works for your application it may be worth
> a try.

This may not save Gordon's app, but I once successfully saved a
canvas-using Tkinter app by bypassing most of the Tkinter Python code,
and calling Tk directly using <widget>.tk.call(...).  It takes a bit
of effort to generate the right Tcl syntax, but it can speed line
drawing up by an order of magnitude...

--Guido van Rossum (home page: http://www.python.org/~guido/)