Planner: vertical scrolling in list of items slow

[ppitonak]

1. open any project with so many work items that vertical scroller appears
2. start scrolling up and down

Result:

• In Chrome, it looks normal but is slow
• In Firefox, the text is disappearing

[ppitonak]

Still reproducible

[mvulavak]

@nimishamukherjee When is the team planning to fix this issue?

[joshuawilson]

@mvulavak this is a P4, so I'm guessing not for a while.

To the devs, I will say that we should look at using virtualization of the view to create a smooth scrolling experience.

[christianvogt]

It's janky in chrome because chrome is holding up the UI thread while it's painting and chrome's scrolling is tied to UI thread.

Firefox on the otherhand scrolls outside of the UI thread and therefore you get smooth scrolling while the UI catches up on painting.

There's nothing wrong here and it is simply an artifact of virtual scrolling. Performance of the row rendering could be improved to make the experience better.

[ldimaggi]

Question on the closing of this issue - will we be addressing the performance of the row rendering? It's pretty awkward from a user perspective in its current form. Thx!

[christianvogt]

@ldimaggi reopening to track as a performance issue as it does seem more noticeable on lesser powered machines.

[ppitonak]

For the record, I can reproduce it on a high-end laptop.