[soegaard]

I got some more information from Flatt.

The new incremental mode means the 16ms deadline is within reach. In fact if the screen is not involved, then 1-2ms is reachable.

On macOS a screen-refresh can cause a 16ms pause.

[xfer]

Didn't incremental GC exist before CS work even began? I certainly remember seeing it although it was not default. Or is this a different implementation?

[samth]

Yes, incremental GC exists in both the CS and BC variants. It works quite differently in each one, though, because the general GC architecture in each is different.