Re: Run `M-x list-input-methods` and then scroll down the screen in input method panel using the mouse or arrow key will cause Emacs unresponsive for about 1 minite.

[Hongyi Zhao]

On Sat, Jun 19, 2021 at 6:03 PM Eli Zaretskii <eliz@gnu.org> wrote:
>
> > From: Hongyi Zhao <hongyi.zhao@gmail.com>
> > Date: Sat, 19 Jun 2021 17:47:18 +0800
> > Cc: emacs-devel@gnu.org
> >
> > Either way, as shown below:
> >
> > $ /usr/bin/emacs
> > $ /usr/bin/emacs -Q
> >
> > And both the following two commands completed instantly:
> >
> > M-x list-input-methods RET
> > C-h h
>
> They also do that in my build, so the question is what is different
> between your "slow" build and the "fast" build.  You need to find out
> and tell us what are the differences between them in terms of
> configuration,

Considering the above testing results, it seems the user configuration
don't play an important role in this problem.

> supported features, optional libraries, etc.

werner@X10DAi:~$ ldd /usr/bin/emacs
    linux-vdso.so.1 (0x00007fff5a725000)
    libasound.so.2 => /lib/x86_64-linux-gnu/libasound.so.2 (0x00007f4566b3f000)
    libacl.so.1 => /lib/x86_64-linux-gnu/libacl.so.1 (0x00007f4566b34000)
    librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f4566b29000)
    libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f4566ad8000)
    libxml2.so.2 => /usr/local/lib/libxml2.so.2 (0x00007f456696e000)
    libgpm.so.2 => /lib/x86_64-linux-gnu/libgpm.so.2 (0x00007f4566768000)
    libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007f4566736000)
    libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1
(0x00007f456670b000)
    libgnutls.so.30 => /lib/x86_64-linux-gnu/libgnutls.so.30
(0x00007f4566535000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007f4566512000)
    libanl.so.1 => /lib/x86_64-linux-gnu/libanl.so.1 (0x00007f456650c000)
    liblcms2.so.2 => /lib/x86_64-linux-gnu/liblcms2.so.2 (0x00007f45664b1000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4566360000)
    libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f4566344000)
    libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0
(0x00007f4566295000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f45660a3000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f456609d000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f4566c80000)
    liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f4566074000)
    libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0
(0x00007f4565fe2000)
    libp11-kit.so.0 => /lib/x86_64-linux-gnu/libp11-kit.so.0
(0x00007f4565eac000)
    libidn2.so.0 => /lib/x86_64-linux-gnu/libidn2.so.0 (0x00007f4565e8b000)
    libunistring.so.2 => /lib/x86_64-linux-gnu/libunistring.so.2
(0x00007f4565d09000)
    libtasn1.so.6 => /lib/x86_64-linux-gnu/libtasn1.so.6 (0x00007f4565cf3000)
    libnettle.so.7 => /lib/x86_64-linux-gnu/libnettle.so.7 (0x00007f4565cb9000)
    libhogweed.so.5 => /lib/x86_64-linux-gnu/libhogweed.so.5
(0x00007f4565c80000)
    libgmp.so.10 => /lib/x86_64-linux-gnu/libgmp.so.10 (0x00007f4565bfc000)
    liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f4565bdb000)
    libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20
(0x00007f4565abd000)
    libffi.so.7 => /lib/x86_64-linux-gnu/libffi.so.7 (0x00007f4565ab1000)
    libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0
(0x00007f4565a8c000)
werner@X10DAi:~$ ldd /usr/local/bin/emacs
    linux-vdso.so.1 (0x00007ffc3f9c1000)
    libtiff.so.5 => /lib/x86_64-linux-gnu/libtiff.so.5 (0x00007fc49ad91000)
    libjpeg.so.8 => /lib/x86_64-linux-gnu/libjpeg.so.8 (0x00007fc49ad0c000)
    libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007fc49acd4000)
    libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fc49acb8000)
    libgif.so.7 => /lib/x86_64-linux-gnu/libgif.so.7 (0x00007fc49acad000)
    libgtk-3.so.0 => /lib/x86_64-linux-gnu/libgtk-3.so.0 (0x00007fc49a4fc000)
    libgdk-3.so.0 => /lib/x86_64-linux-gnu/libgdk-3.so.0 (0x00007fc49a3f5000)
    libpango-1.0.so.0 => /lib/x86_64-linux-gnu/libpango-1.0.so.0
(0x00007fc49a3a6000)
    libharfbuzz.so.0 => /usr/local/lib/libharfbuzz.so.0 (0x00007fc49a29d000)
    libcairo.so.2 => /lib/x86_64-linux-gnu/libcairo.so.2 (0x00007fc49a17a000)
    libgdk_pixbuf-2.0.so.0 =>
/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0 (0x00007fc49a152000)
    libgio-2.0.so.0 => /lib/x86_64-linux-gnu/libgio-2.0.so.0
(0x00007fc499f71000)
    libgobject-2.0.so.0 => /lib/x86_64-linux-gnu/libgobject-2.0.so.0
(0x00007fc499f0f000)
    libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0
(0x00007fc499de6000)
    libSM.so.6 => /lib/x86_64-linux-gnu/libSM.so.6 (0x00007fc499ddb000)
    libICE.so.6 => /lib/x86_64-linux-gnu/libICE.so.6 (0x00007fc499dbd000)
    libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007fc499c80000)
    libX11-xcb.so.1 => /lib/x86_64-linux-gnu/libX11-xcb.so.1
(0x00007fc499c7b000)
    libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007fc499c4f000)
    libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1
(0x00007fc499a45000)
    libasound.so.2 => /lib/x86_64-linux-gnu/libasound.so.2 (0x00007fc49994a000)
    librsvg-2.so.2 => /lib/x86_64-linux-gnu/librsvg-2.so.2 (0x00007fc49901f000)
    libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fc498ed0000)
    libacl.so.1 => /lib/x86_64-linux-gnu/libacl.so.1 (0x00007fc498ec5000)
    librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fc498eb8000)
    libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007fc498e67000)
    libXfixes.so.3 => /lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007fc498e5f000)
    libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x00007fc498e4a000)
    libxml2.so.2 => /usr/local/lib/libxml2.so.2 (0x00007fc498ce0000)
    libgpm.so.2 => /lib/x86_64-linux-gnu/libgpm.so.2 (0x00007fc498ada000)
    libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007fc498aa8000)
    libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1
(0x00007fc498a7d000)
    libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6
(0x00007fc4989be000)
    libfontconfig.so.1 => /lib/x86_64-linux-gnu/libfontconfig.so.1
(0x00007fc498977000)
    libotf.so.0 => /lib/x86_64-linux-gnu/libotf.so.0 (0x00007fc49895f000)
    libgnutls.so.30 => /lib/x86_64-linux-gnu/libgnutls.so.30
(0x00007fc498789000)
    libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007fc498764000)
    libanl.so.1 => /lib/x86_64-linux-gnu/libanl.so.1 (0x00007fc49875e000)
    liblcms2.so.2 => /lib/x86_64-linux-gnu/liblcms2.so.2 (0x00007fc498703000)
    libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fc4986fd000)
    libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0
(0x00007fc49864e000)
    libjansson.so.4 => /lib/x86_64-linux-gnu/libjansson.so.4
(0x00007fc49863f000)
    libgmp.so.10 => /lib/x86_64-linux-gnu/libgmp.so.10 (0x00007fc4985b9000)
    libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc4983c7000)
    libwebp.so.6 => /lib/x86_64-linux-gnu/libwebp.so.6 (0x00007fc49815e000)
    libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007fc4980b5000)
    liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007fc49808c000)
    libjbig.so.0 => /lib/x86_64-linux-gnu/libjbig.so.0 (0x00007fc497e7e000)
    libgmodule-2.0.so.0 => /lib/x86_64-linux-gnu/libgmodule-2.0.so.0
(0x00007fc497e76000)
    libpangocairo-1.0.so.0 =>
/lib/x86_64-linux-gnu/libpangocairo-1.0.so.0 (0x00007fc497e64000)
    libXi.so.6 => /lib/x86_64-linux-gnu/libXi.so.6 (0x00007fc497e52000)
    libcairo-gobject.so.2 =>
/lib/x86_64-linux-gnu/libcairo-gobject.so.2 (0x00007fc497e46000)
    libatk-1.0.so.0 => /lib/x86_64-linux-gnu/libatk-1.0.so.0
(0x00007fc497e1c000)
    libatk-bridge-2.0.so.0 =>
/lib/x86_64-linux-gnu/libatk-bridge-2.0.so.0 (0x00007fc497de5000)
    libepoxy.so.0 => /lib/x86_64-linux-gnu/libepoxy.so.0 (0x00007fc497cb0000)
    libfribidi.so.0 => /lib/x86_64-linux-gnu/libfribidi.so.0
(0x00007fc497c93000)
    libpangoft2-1.0.so.0 => /lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
(0x00007fc497c7a000)
    libXinerama.so.1 => /lib/x86_64-linux-gnu/libXinerama.so.1
(0x00007fc497c75000)
    libXrandr.so.2 => /lib/x86_64-linux-gnu/libXrandr.so.2 (0x00007fc497c68000)
    libXcursor.so.1 => /lib/x86_64-linux-gnu/libXcursor.so.1
(0x00007fc497c5b000)
    libXcomposite.so.1 => /lib/x86_64-linux-gnu/libXcomposite.so.1
(0x00007fc497c54000)
    libXdamage.so.1 => /lib/x86_64-linux-gnu/libXdamage.so.1
(0x00007fc497c4f000)
    libxkbcommon.so.0 => /lib/x86_64-linux-gnu/libxkbcommon.so.0
(0x00007fc497c0d000)
    libwayland-cursor.so.0 =>
/lib/x86_64-linux-gnu/libwayland-cursor.so.0 (0x00007fc497c02000)
    libwayland-egl.so.1 => /lib/x86_64-linux-gnu/libwayland-egl.so.1
(0x00007fc497bfd000)
    libwayland-client.so.0 =>
/lib/x86_64-linux-gnu/libwayland-client.so.0 (0x00007fc497bec000)
    libthai.so.0 => /lib/x86_64-linux-gnu/libthai.so.0 (0x00007fc497bdf000)
    libpixman-1.so.0 => /lib/x86_64-linux-gnu/libpixman-1.so.0
(0x00007fc497b38000)
    libxcb-shm.so.0 => /lib/x86_64-linux-gnu/libxcb-shm.so.0
(0x00007fc497b33000)
    libxcb-render.so.0 => /lib/x86_64-linux-gnu/libxcb-render.so.0
(0x00007fc497b24000)
    libmount.so.1 => /lib/x86_64-linux-gnu/libmount.so.1 (0x00007fc497ac4000)
    libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007fc497aa6000)
    libffi.so.7 => /lib/x86_64-linux-gnu/libffi.so.7 (0x00007fc497a9a000)
    libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007fc497a27000)
    libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007fc497a1e000)
    libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007fc497a04000)
    libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007fc4979fc000)
    libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007fc4979f4000)
    /lib64/ld-linux-x86-64.so.2 (0x00007fc49b506000)
    libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fc4979d9000)
    libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0
(0x00007fc497949000)
    libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007fc49791b000)
    libp11-kit.so.0 => /lib/x86_64-linux-gnu/libp11-kit.so.0
(0x00007fc4977e3000)
    libidn2.so.0 => /lib/x86_64-linux-gnu/libidn2.so.0 (0x00007fc4977c2000)
    libunistring.so.2 => /lib/x86_64-linux-gnu/libunistring.so.2
(0x00007fc497640000)
    libtasn1.so.6 => /lib/x86_64-linux-gnu/libtasn1.so.6 (0x00007fc49762a000)
    libnettle.so.7 => /lib/x86_64-linux-gnu/libnettle.so.7 (0x00007fc4975f0000)
    libhogweed.so.5 => /lib/x86_64-linux-gnu/libhogweed.so.5
(0x00007fc4975b9000)
    liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007fc497596000)
    libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20
(0x00007fc497478000)
    libatspi.so.0 => /lib/x86_64-linux-gnu/libatspi.so.0 (0x00007fc497441000)
    libdatrie.so.1 => /lib/x86_64-linux-gnu/libdatrie.so.1 (0x00007fc497437000)
    libblkid.so.1 => /lib/x86_64-linux-gnu/libblkid.so.1 (0x00007fc4973de000)
    libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0
(0x00007fc4973bb000)

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China