UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. open any page with a few dozens small animated gif
2. Make sure the gifs are within the visible part of the page (i.e. inside the scroll range)
3. watch CPU consumption

What is the expected behavior?
CPU consumption should be very low

What went wrong?
CPU consumption is ridiculously high, often far exceeding 100%

CPU consumption drops when the gifs are out of the viewport (this part is expected).

Did this work before? Yes many years ago, but it definitely did at some point

Chrome version: 53.0.2785.143  Channel: n/a
OS Version: ubuntu 15.10
Flash Version: Shockwave Flash 23.0 r0

Nobody is replying to  issue 539539 , which has been marked as duplicate of some nonexsiting issue, or one that is not publicly accessible, which is nonsense.

There are a bunch of other bug reports about the same issue; the ones I've looked at are closed as "fixed", which is obviously bullshit.

For fuck's sake how can such a huge issue be still around after so many years??