Comment 4 for bug 1584965

Initial investigation: There seems to be a blocking of task by blink scheduler because of prioritization of other task. So this may be result of side effect of blink scheduler policy.
Need to check more before any conclusion.
I get this log on console thrown by blink scheduler while scrolling on slashdot.org

qml: [JS] (https://slashdot.org/:0) Blink deferred a task in order to make scrolling smoother. Your timer and network tasks should take less than 50ms to run to avoid this. Please see https://developers.google.com/web/tools/chrome-devtools/profile/evaluate-performance/rail and https://crbug.com/574343#c40 for more information.