Speed up CommitteeInline

Prefetch the users in the CommitteeInline

website/activemembers/admin.py

 from django.contrib import admin
+from django.forms import ModelForm
 
 from activemembers.forms import CommitteeMembershipForm
+from members.models import Member
 from utils.translation import TranslatedModelAdmin
 from . import models
 
 
+class CommitteeMembershipInlineForm(ModelForm):
+    """
+    Form for the Committee Membership inline
+
+    Doesn't do anything fancy, but we need it for speed.
+    """
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        # Get the related fields in advance
+        self.fields['member'].queryset = Member.objects.select_related('user')
+
+
 class CommitteeMembershipInline(admin.StackedInline):
     model = models.CommitteeMembership
+    form = CommitteeMembershipInlineForm
     can_delete = False
     ordering = ('since',)
     extra = 0