Very slow performance on editing issues when projects have inherit members checked
Recently I updated all my projects checking "Inherit members" in order to make our life easier when you have to assign groups and roles to members.
In my scenario I have a main project and by heritage I have the rest of the projects.
If you try to create and edit an issue in the main project all are updated smoothly.
If you try to create and edit an issue in a 4 level project heritage the performance becomes in a terrible slow updating.
Note: I can't reproduce this problem when a user has admin rights.
Redmine version: 2.5.2
Mysql version: 5.5.38