RSS.pt seems to use some slow contentsMethod. See if it can be helped.
LeMill/skins/lemill/RSS.pt 595.24 516 1.1536
Expression Total time Number of calls Time per call
Total rendering time for page template 595.24 516 1.15357
All expressions 855.22 85134 0.01
path: folderContents|python:contentsMethod() 280.45 516 0.54351
python: contentsMethod() 280.42 516 0.54345
path: brain/getObject|python:brain 185.26 4791 0.03867
python: results[:max] 35.69 516 0.06917
python: '%s: %s' % (portal.Title(), context.pretty_title_or_id()) 11.81 516 0.02289
path: obj_item/getLatestEdit 11.76 4791 0.00245
path: obj_item/getURL|obj_item/absolute_url|nothing 10.85 9582 0.00113
path: context/rssAllowed 8.98 516 0.0174
path: obj_item/getLastEditor | obj_item/Creator | nothing 6.31 4791 0.00132
path: obj_item/Rights | nothing 3.55 4791 0.00074