[okular] [Bug 492529] okular is very slow opening some PDFs

[William Bader]

https://bugs.kde.org/show_bug.cgi?id=492529

--- Comment #5 from William Bader <williambader at hotmail.com> ---
(In reply to Timothée Ravier from comment #4)
> I've opened this PDF in fresh Fedora 40 and Fedora 41 VMs and it loaded in
> 1-2 seconds. It also loads quickly on my Kinoite 40 installation with
> Flathub's Okular so I recommend giving this a try to narrow down the
> potential root cause: https://flathub.org/apps/org.kde.okular

Thank you for the reply. I'm willing to try that. Fedora provides flatpak. It
looks like it would install about a GB.
After testing, can I used `flatpack uninstall ...` to remove everything that
`flatpak install flathub org.kde.okular` loaded?

My laptop has no CD drive, but it has USB 3 and 64 GB RAM, so I can boot ISOs
copied to usb sticks (which is how I tested Fedora 40 before updating to it),
but I would rather test with flatpak or a VM first.

```$ flatpak install flathub org.kde.okular
Looking for matches…
Required runtime for org.kde.okular/x86_64/stable
(runtime/org.kde.Platform/x86_64/6.7) found in remote flathub
Do you want to install it? [Y/n]: y

org.kde.okular permissions:
    ipc                  network      cups      fallback-x11      pulseaudio   
  wayland      x11      dri      file access [1]
    dbus access [2]

    [1] host, xdg-config/kdeglobals:ro
    [2] com.canonical.AppMenu.Registrar, org.kde.KGlobalSettings,
org.kde.kconfig.notify


        ID                                                        Branch       
          Op             Remote              Download
 1.     org.freedesktop.Platform.GL.default                       23.08        
          i              flathub             < 170.7 MB
 2.     org.freedesktop.Platform.GL.default                       23.08-extra  
          i              flathub             < 170.7 MB
 3.     org.freedesktop.Platform.GL.nvidia-560-35-03              1.4          
          i              flathub             < 323.4 MB
 4.     org.freedesktop.Platform.VAAPI.Intel                      23.08        
          i              flathub              < 13.4 MB
 5.     org.freedesktop.Platform.openh264                         2.2.0        
          i              flathub             < 944.3 kB
 6.     org.kde.KStyle.Adwaita                                    6.7          
          i              flathub               < 8.1 MB
 7.     org.kde.Platform.Locale                                   6.7          
          i              flathub             < 393.3 MB (partial)
 8.     org.kde.Platform                                          6.7          
          i              flathub             < 333.9 MB
 9.     org.kde.okular.Locale                                     stable       
          i              flathub               < 2.8 MB (partial)
10.     org.kde.okular                                            stable       
          i              flathub              < 35.5 MB

Proceed with these changes to the system installation? [Y/n]: n
```

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