Possible memory leak in dashboard?

[Zac-HD]

I've had a report that there is a memory leak of sorts (or perhaps it’s just the dashboard point append?) that makes the fuzz process take 100G of RAM in a few hours. We should probably trace this with e.g. https://github.com/bloomberg/memray, and either fix the leak or compress the trace by dropping intermediate identical points - we only need first and last for the plot I think.