UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.89 Safari/537.36

Steps to reproduce the problem:
1. Run a Window-Tilingmanager like DWM
2. Run chromium on 2 monitors
3. Have 2 chromium instances open on both screens
4. Change on one screen the virtual desktop (workspace)
5. The active chromium on the other screen will not act very slowly and will not respond to user interaction, HTML5 videos on youtube or other services will be stucked (sound is no problem)

What is the expected behavior?
chromium should behave normally and respond to user input as fast as like I have just 1 chromium instance open.

What went wrong?
the active chromium instance will respond slowly, HTML5 videos will be stucked.

Did this work before? N/A 

Chrome version: 52.0.2743.116  Channel: n/a
OS Version: 4.7.2-1
Flash Version: No flash installed

While trying to trace this issue.. I get an 'Aw, Snap!' page on the stucked chromium. Maybe because the buffer was already full? I stopped the first time at 100%.. then I got the snap page.. at the second try it has worked with just 46% buffer usage.
 

Deleted: vid-2016-09-01-212845.mp4 2.1 MB

	vid-2016-09-01-212845.mp4 2.1 MB View Download

Deleted: trace.gz 6.7 MB

trace.gz 6.7 MB Download