Kicad schematic editor slow

If there are performance issues with Kicad and the schematics editor running on a ATI Radeon GPU hardware consider to add a xorg option in the file

/usr/share/X11/xorg.conf.d/20-radeon.conf:

Section "Device"
    Identifier "Radeon"
    Driver "radeon"
    Option "AccelMethod" "exa"
    Option "MigrationHeuristic" "greedy"
    Option "EXAPixmaps" "false"
EndSection

The option EXAPixmaps is documented here: https://www.x.org/archive/X11R7.6/doc/man/man4/radeon.4.xhtml

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