On Aug 6, 2014, at 11:14 AM, Maxim Lacrima <lacrima.ma...@gmail.com> wrote:
> The reason is that on each keystroke, the whole terminal buffer is redrawn. I
> wonder how I can optimize this. Currently I don't see a solution. Also I am
> wondering if I took right approach to embed manhole interpreter into a widget
> in the first place, but I don't see a solution, except using `TerminalBuffer`
> to capture manhole output.
Optimizing this will almost certainly involve patching Twisted. Which you
should definitely do :).
The reason the entire screen is redrawn is that a general implementation of a
widget, i.e. one that can be displayed anywhere on the terminal, you do just
have to redraw the entire widget when certain things happen, like when the
screen scrolls. You can see this in other software by observing the fairly
significant performance difference between a vertical split and a horizontal
split in tmux. Nothing to do with Twisted there, just a general limitation of
terminals.
The optimizations you could implement are one where inputting individual
characters doesn't cause a full screen redraw, and avoiding a full screen
redraw when scrolling if the edges of the widget touch the edges of the full
terminal (setting up a scroll area for that case).
I think that using a widget for this case does indeed make sense (just as I'm
super glad that tmux has vertical splits, even if they're kinda slow), and it
would be great to get these optimizations into Twisted.
-glyph
_______________________________________________
Twisted-Python mailing list
Twisted-Python@twistedmatrix.com
http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
