i think you know this, but just in case.
it’s completely normal and understandable that in editor it will run with less performance. since it has a lot more overhead and even data. that’s why usually it’s recommended to do your performance tests on packaged builds.
as for 1. i havent noticed, but it might be possible.
the only alternative i can think of is to work around it. or spend some time to narrow down the extra cost.
maybe using “insight.”
though i think the architecture changed a bit in 5.5. they’ve changed some fundamental code.
though, in general, spawning actors frequently it’s not really something that is recommended.