Optimize issue creation

app/services/issuable_base_service.rb

@@ -483,6 +483,8 @@ class IssuableBaseService < BaseService
   # we need to check this because milestone from milestone_id param is displayed on "new" page
   # where private project milestone could leak without this check
   def ensure_milestone_available(issuable)
+    return unless issuable.supports_milestone? && issuable.milestone_id.present?
+
     issuable.milestone_id = nil unless issuable.milestone_available?
   end
 

app/services/issues/base_service.rb

@@ -52,7 +52,7 @@ module Issues
     end
 
     def execute_hooks(issue, action = 'open', old_associations: {})
-      issue_data  = hook_data(issue, action, old_associations: old_associations)
+      issue_data  = Gitlab::Lazy.new { hook_data(issue, action, old_associations: old_associations) }
       hooks_scope = issue.confidential? ? :confidential_issue_hooks : :issue_hooks
       issue.project.execute_hooks(issue_data, hooks_scope)
       issue.project.execute_services(issue_data, hooks_scope)