https://bugs.kde.org/show_bug.cgi?id=412522

--- Comment #2 from [email protected] ---
(In reply to Ahab Greybeard from comment #1)
> Using the 4.2.7-beta1 with Linux and a 2000 x 2000 px image, it takes 90
> seconds to complete the Raindrop filter. During this time, I can open the
> brush editor and the settings window, i.e. there is no 'freeze'. CPU usage
> is at about 60-80% while this is happening.
> 
> With Windows 10 on the same machine, it takes 8 minutes to complete the
> Raindrop filter and there is no visible output for the first four minutes.
> (The canvas is updated in 500 x 500 px blocks and this seems to be common
> for most filters but most filters are not this slow.)
> It makes no difference if I use OpenGL or Angle.
> During this time, there is no freeze and CPU usage is about 12%.

Ok. But it's not an expected behavior, is it?

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