* Don't reorder already seen posts in PostThread
* Add sorting by generation
* Rip out stable order cache
It doesn't make sense because sort() doesn't call the callback for all A/B pairs, and the server returning a different ordering will cause cache misses which means there'll be no stability anyway.
* Make hotness deterministic per fetched at
* Cache random scores while in thread
* Reorder for clarity
dan
b9406aa011