How to reduce reserved unused heap memory?

Iam doing some temporary memory intesive opeartions in a custom editor window but after Iam done all that memory is now sitting unused in ‘ManagedHeap.ReservedUnusedSize’ according to the profiler. How can I return this memory back to os? Looking into task manger, Unity is now using most of my RAM and I can’t do anything about it.

Hopefully this will help. Perhaps break your textures into smaller ones.