Yeah, so call me a troll if you want. I'm kinda enjoying my negative scores.

I'm astonished though that any of this is "surprising news." It's kinda like filing a bug report: "Rage/Doom/etc cause high CPU usage, PLZ FIX." Uhm, yeah.

There are a number of different algorithms for drawing blur. Some of them are high quality but require more iterations for larger radii, some are much faster and "scale" quite well but aren't of nearly the same high quality.

Of course putting complex effects that are computed on the CPU are going to be slow -- at least just a tiny litte little.