Grasshopper for mac awfully slow since last update

I am mainly using a quite large and complex GH definition.
In the beginning I used a virtual Windows 10 (parallels) but switched to the mac version once Opennest was available for mac a few weeks back. Everything worked just fine until I ran the last update (6.35.21222.17002) a few days back. I reopened the file again today and what used to take about 5 seconds now takes about 130 seconds. Like this it’s not much fun to work with it! Did I miss anything?