Monteverdi performance problem

Description

When opening an image in Monteverdi on my system, dragging the image view is very slow (about ~1 sec lag). It does not happen with iceViewer where navigation is smooth. I can reproduce with any image (even a small png).

Steps to reproduce

Open an image and drag the view.

Configuration information

Ubuntu 18.04, linux 64 bit.

Reproduced both with develop build (using superbuild dependencies) and standalone linux package of 6.6.1.