I noticed really annoying thing concerning views. It consumes huge amount of memory. I have export made with Drush (Views data export module - allows to export view to a file) and I noticed that it consumes huge amount of memory. At first I've tried to optimize my code, but it won't worked. I cleared views cache in my operation, but it doesn't help. It concerns only complex views (with alterations and relationships).
How to reduce memory usage of views? I ask to make sure that there is some kind of workaround and not to built my own bicycle.