On Wed, Oct 11, 2017 at 03:35:34PM +0000, Richard Heck wrote: > On 10/08/2017 10:19 AM, racoon wrote: > > On 08.10.2017 00:19, Scott Kostyshak wrote: > >> On Sat, Oct 07, 2017 at 05:57:48PM +0000, Richard Heck wrote: > >>> On 10/07/2017 12:09 PM, racoon wrote: > >>>> Hi, > >>>> > >>>> I noticed that beta1 shows some slowness when undoing with some of my > >>>> documents. While undoing is instantaneous in 2.2.3, 2.3 takes about a > >>>> second to respond to it. > >>>> > >>>> Did anyone notice this? I don't have a very fast computer though. > >>> > >>> Yes, I have also seen that, and my machines are pretty fast. > >> > >> I can't reproduce. My test case was to open the user guide, selected > >> all, delete, and undo. Both were instantaneous for me. Do you have a > >> better test case for me? > > > > Okay, I think I have narrowed it down to the inclusion of any > > bibliography. Test case attached. > > In investigating this, I typed a bunch of short lines: a, b, c, d, etc, > all alone on their own lines. I did not see slowness on undo until I had > typed quite a few, and then suddenly there it was. But then it was gone > again. I'll try again later to figure out how to reproduce it reliably. > > What is clear is that undo is a lot slower when entire lines are being > removed or replaced, as opposed merely to part of a single line, > especially the last character being restored. I would guess this is > because we do a full screen redraw in the slower case.
Richard, is the above slowness a change with respect to 2.2.x? Scott
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