If you want some insight into how loading big post threads works at scale, I wrote a (small) thread on the challenges that come with thread loading, pagination, and more.
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Jaz
Server side thread sorting is hard, especially when you want to have multiple sort orders and viewer-specific-sorting (i.e. people i follow at the top). There's no database that supports that kind of arbitrary ordering at scale and we don't have great API shapes to do it efficiently yet.
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