improve get commits performance

templates/repo/header.tmpl

@@ -8,7 +8,7 @@
 						<a href="{{AppSubUrl}}/{{.Owner.Name}}">{{.Owner.Name}}</a>
 						<div class="divider"> / </div>
 						<a href="{{$.RepoLink}}">{{.Name}}</a>
-						{{if .IsMirror}}<div class="fork-flag">{{$.i18n.Tr "repo.mirror_from"}} <a target="_blank" href="{{$.MirrorAddress}}">{{$.Mirror.Address}}</a></div>{{end}}
+						{{if .IsMirror}}<div class="fork-flag">{{$.i18n.Tr "repo.mirror_from"}} <a target="_blank" href="{{$.Mirror.Address}}">{{$.Mirror.Address}}</a></div>{{end}}
 						{{if .IsFork}}<div class="fork-flag">{{$.i18n.Tr "repo.forked_from"}} <a href="{{.BaseRepo.RepoLink}}">{{SubStr .BaseRepo.RepoLink 1 -1}}</a></div>{{end}}
 					</div>