Eeschema slow navigation

[Fabián Inostroza]

Eeschema gets very slow when a schematic with large components or many components is loaded and almost all the page is shown.

I've tried the project linked here https://bugs.launchpad.net/kicad/+bug/1737363 by Chris Pavlina and with a much more simple project: just a Virtex 7 FPGA with no other components.

When the zoom level is zoom to fit the crosshair lags considerably behind the mouse cursor and the kicad process uses near 100% cpu. Zooming in to a small area of the schematic makes it smoother. Pcbnew works fine with the "modern toolset", the "legacy toolset" shows garbage in the drawing area.

Eeschema in KiCad 4.0.7 worked fine.

I'm running Debian Testing with GNOME and X11 on a Intel i7 i3520M, integrated graphics.

The kicad package is from the experimental repository and the version information is:
Application: kicad
Version: 5.0.0-rc2-dev-unknown+dfsg1+20180318-3, release build
Libraries:
    wxWidgets 3.0.4
    libcurl/7.58.0 OpenSSL/1.0.2o zlib/1.2.8 libidn2/2.0.4 libpsl/0.20.1 (+libidn2/2.0.4) libssh2/1.8.0 nghttp2/1.31.0 librtmp/2.3
Platform: Linux 4.15.0-2-amd64 x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.4 (wchar_t,wx containers,compatible with 2.8) GTK+ 3.22
    Boost: 1.62.0
    Curl: 7.58.0
    Compiler: GCC 7.3.0 with C++ ABI 1011

Build settings:
    USE_WX_GRAPHICS_CONTEXT=ON
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_SPICE=OFF

[Maciej Suminski (orsonmmz)]

This is caused by wxWidgets library switch from GTK2 to GTK3.