Add real time render stats that can be enabled by the user for a particular asset or render attempt. Currently render stats are enabled temporarily for the entire CMS Instance via feature flag.
Would be most helpful in cases where a single template is very slow. While most often the template, being able to find out exactly which part is most the cause would help fix that issue.
In addition showing what's causing the slowdown can help us make decisions about whether it is a code issue or a cms issue.
