admin: Attempt to optimize matches admin

web/proboj/matches/admin.py

@@ -6,6 +6,18 @@
 class MatchBotInline(admin.TabularInline):
     model = MatchBot
 
+    # select related bot, as it is fetched for each BotVersion
+    # (to retrieve BotVersion.__str__) and this is called for every
+    # match bot in match admin
+    def get_formset(self, request, obj=None, **kwargs):
+        formset = super(MatchBotInline, self).get_formset(request, obj, **kwargs)
+
+        queryset = formset.form.base_fields["bot_version"].queryset
+        queryset = queryset.select_related("bot")
+        formset.form.base_fields["bot_version"].queryset = queryset
+
+        return formset
+
 
 @admin.action(description="Enqueue selected matches")
 def enqueue_match(modeladmin, request, queryset):