split doesn't memoize on Signal[LazyList[A]]

[mattjacobus]

SplitSignal uses side effects in a map over the elements to keep track of which keys have been seen and since the LazyList is evaluated later, it believes no keys were seen and purges all the child signals and calls your project function on every event. You might want another implicit specifically for LazyLists that does a force.

[raquo]

Thanks, good find! Somehow I've never used LazyList...

I think I'll update the map method of ImmutableSeqSplittable to do something special if the input is a LazyList. Probably convert it to a strict Seq like List or ArraySeq.

[raquo]

This was fixed in 17.0.0, forgot to close earlier.