I'm updating from v3 to v4.
I've updated D3 to d3@5.16.0.
In the process of slowly increasing DC versions, I noticed a problem introduced in 4.1.0 which is still present in 4.2.7.

For brushing, the animation slows to a crawl.
It looks like the filtering function is being called continuously:

This video shows the speed of a normal filter, then of a ranged filter:

Broken Example

It looks like the same issue is occurring with one of the examples:
https://dc-js.github.io/dc.js/examples/brush-ordinal-dynamic.html