UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2689.0 Safari/537.36

Example URL:
https://dl.dropboxusercontent.com/u/15217362/bugs/scrollperf/slow.html

Steps to reproduce the problem:
Test URL: https://dl.dropboxusercontent.com/u/15217362/bugs/scrollperf/slow.html

1. Scroll the number list.
2. Observe performance visually. (Also try recording a timeline while scrolling.)

What is the expected behavior?
This is all static content, so it should scroll perfectly smoothly.

What went wrong?
Chrome's scrolling performance is terrible. I recorded a timeline and on a high-end dev machine it's spending 9ms in "scroll" and 55ms in "Update Layer Tree" (!) per frame (!!).

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? N/A 

Does this work in other browsers? Yes 

Chrome version: 51.0.2689.0  Channel: canary
OS Version: 10.0
Flash Version: Shockwave Flash 21.0 r0

Both Firefox and Edge handle this case perfectly smoothly, so this performance problem is exclusive to Chrome.

Also compare to this case which runs fast in Chrome as well: https://dl.dropboxusercontent.com/u/15217362/bugs/scrollperf/fast.html

The *only* change is removing overflow-y: scroll. This means the main window viewport scrolls instead, and that is perfectly smooth. So there's nothing about scrolling the content that is demanding, Chrome is entirely capable of doing it fast, it's just super slow in a scroll container.