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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.

./configure
--disable-gs
--disable-qt
--enable-pdf-renderer
--disable-experimental

disabling cairo support
disabling imlib2 support
disabling axel support
disabling sqlite3 support
disabling Sparkle usage
enabling X11 port
disabling experimental Cocoa port
disabling debugging
enabling assertion checking
enabling warning flags -Wall -Wno-return-type
disabling sanity checks
disabling experimental style rewriting code
enabling optimizations, -O3 -fexpensive-optimizations

(With a few hiccups, I had to manually add "-lpthreads" to a makefile,
and I had to hack src/Plugins/LaTeX_Preview/latex_preview.cpp to get
rid of the gs_image_size and gs_prefix functions, since I was compiling
without ghostscript support, and I had to hack
src/Edit/Interface/edit_mouse.cpp to get rid of the reference to some
extern hashmap payloads, which was never really defined, except maybe
in src/Plugins/Qt/QTMWidget.cpp, but I disabled Qt support.)


On Wed, 30 Oct 2019 22:12:45 -0400, Dennis Nezic wrote:
> I'm running Gentoo's texmacs-1.99.11 ebuild, on an x86_64 cpu. I'm
> trying to compile it without Qt, to see if that changes anything.
>
> On Wed, 30 Oct 2019 07:33:56 +0100, TeXmacs wrote:
> > Hi Dennis,
> >
> > That is bad news, but note that the official releases are still
> > based on Qt4; the Qt5 version is currently in a test phase. Could
> > you give us more details on your system and what version of TeXmacs
> > you are using (do you use some pre-compiled binary or did you do the
> > compilation yourself)?
> >
> > Best wishes, --Joris
> >
> >
> > On Tue, Oct 29, 2019 at 09:52:57PM -0400, Dennis Nezic wrote:
> > > I don't think this is the same question covered in the FAQ, which
> > > places the blame on bad 2d gpu drivers. I was comfortably using
> > > the older non-qt 1.0.7 version for years before, so I think it's
> > > something new that was introduced between then and the 1.99
> > > series :P. Is there anything I can do to try speeding things up?
> > >
> > > With the new qt5 based version, my cpu regularly hovers above 50%,
> > > even while typing basic non-math stuff. Even using my left/right
> > > keyboard keys to move through text, my cpu often reaches 70%.
> > > Heck, even pressing the Home or End keys can spike my cpu to 80%,
> > > and there is a frustrating delay before the cursor actually
> > > visually jumps.

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• Newer qt5 texmacs is slow while editing, Dennis Nezic, 10/30/2019
  • Re: Newer qt5 texmacs is slow while editing, TeXmacs, 10/30/2019
    • Re: Newer qt5 texmacs is slow while editing, Dennis Nezic, 10/31/2019
      • Re: Newer qt5 texmacs is slow while editing, Dennis Nezic, 10/31/2019

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