This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
The logic is too hairy and we can't reliably determine
when to force summary mode. Work is underway to improve
perf for megatopics so this will not be required
eventually.
Sam Saffron
Guo Xiang Tan
Vinoth Kannan
Erick Guan