XTerm scrolling in xorg-server @1.20.4_0

[Ken Preslan]

The new xterm does indeed make xterms running natively on my Mac run
faster than they were yesterday.  However, it does not help the
performance regression for remote xterms running over X11/ssh forwarding.
Those are still majorly slower than they were last week.  Local and remote
Tcl/Tk apps are slower too.  Interestingly, scrolling in the "emacs +x11"
port is unaffected and seems just as fast as it was.

Thanks for looking into this.


On Tue, Apr 02, 2019 at 04:25:38PM +0100, Chris Jones wrote:
> Hi,
> 
> I've just pushed an update to xterm enabling the double buffer option in its
> configuration step. Could those affected please update to 344_1 and report
> back how that goes.
> 
> cheers Chris
> 
> On 02/04/2019 3:29 pm, Ken Cunningham wrote:
> > looks like the double buffering is not enabled or functioning and xterm is writing directly into the display buffer rather than into the back buffer and blitting it.
> > 
> > > On Apr 2, 2019, at 04:28, Michael Dickens <michaelld at macports.org> wrote:
> > > 
> > > This issue started with the prior "xorg-server-devel" bump a while back. I just moved to iTerm2 for the interim; -very- impressed with that terminal manager! I still need Xterm for some things though ... sigh ... - MLD
> > > 
> > > On Mon, Apr 1, 2019, at 11:37 PM, Ken Cunningham wrote:
> > > > > Has anybody else noticed that text scrolling in a xterm is now glacially
> > > > > slow since xorg-server was upgraded to @1.20.4_0 over the weekend?
> > > > > X11 is really painful to use now.
> > > > 
> > > > It certainly is. There is something wrong with the screen redrawing in
> > > > xterm now, it seems.
> > > > 
> > > > Ken

-- 
Ken Preslan <ken at preslan.org>