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Re: Newer qt5 texmacs is slow while editing


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  • From: TeXmacs <address@hidden>
  • To: address@hidden
  • Subject: Re: Newer qt5 texmacs is slow while editing
  • Date: Sun, 3 Nov 2019 04:11:21 +0100
Hi Dennis,

On Thu, Oct 31, 2019 at 12:16:29PM -0400, Dennis Nezic wrote:
> I was finally able to compile 1.99.11 without Qt, and it was
> significantly faster, I think basically the same as the 1.0.7 lagginess
> that I was used to. For example, with the Qt5 compilation, simply
> pressing Home and End on a line of basic text took about a second at
> 100% cpu, whereas with the X11 port it took about half a second and
> about 50% cpu. I wish both could be a lot faster, I'm not sure why this
> would be cpu intensive, but with Qt5 it was unbearable.

I would be interested trying to reproduce the slowness that you
are experiencing. Can you please send me a simple test document that
demonstrates the problem and tell me where to put the cursor and
press Home and End? What kind of computer are you working on?

The algorithm for Home and End may be somewhat suboptimal,
but 0.5 or 1 second is too long for ordinary text.

Best wishes, --Joris

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