Comment 1 for bug 172207

Originator: YES

Another interesting field of application is benchmarking. (A "null" export
might be interesting as well.)

Currently the export speed varies greatly with the proportions of the
image.

32x32768 took 16.5930 s
32768x32 took 1.2970 s

4096x256 took 3.8440 s
256x4096 took 8.5790 s

2048x512 took 3.6090 s
512x2048 took 4.0940 s

(In all cases the number of pixels is equal to 1024x1024.)

It would be interesting to know if the png export or blur code is
responsible for this behavior.