@vix I just heard back from our developer team.
They did some fixes and have an early version of the improved Chromium container. Please try this:
docker run -d --rm --name=chromium -v /tmp:/tmp -v /var/run/dbus:/var/run/dbus -v /dev/galcore:/dev/galcore --device-cgroup-rule='c 199:* rmw' --security-opt seccomp=unconfined --shm-size 256mb leonardoheldattoradex/chromium:150224 https://webglsamples.org/aquarium/aquarium.html
Currently the container image is stored in the dockerhub repo of one of the developers as it’s not officially released yet. But you can still try it. The developer was able to get much better performance on the aquarium demo then you reported prior. For the weston container just use the currently release container image for that.
Please let us know how this fixed version works for you, we appreciate the feedback.
Best Regards,
Jeremias