jinja2.Environment has a auto_reload var which defaults to True The only place it is specified is in app_cfg.py where it sets it to self.auto_reload_templates which comes from turbogears and as far as I can tell is only set to True.
We should have a config var in the ini file that all jinja2.Environment constructors use
TG 2.1.4 supports this as a config var (commit https://github.com/TurboGears/tg2/commit/fb9d42fcec21617d60ff2eeb0958fec4214b4a2c)
Waiting on ticket for new deps for SF sandboxes https://trac.geek.net/trac/siteops/ticket/52625