Algorithm update

[fed135]

Is your feature request related to a problem? Please describe. Coalescence should happen before cache check to prevent multiple same-key checks in cache, especially if the cache happens to be an external store, like redis.

Describe the solution you'd like Move coalescence before cache check

Describe alternatives you've considered None considered right now

Additional context This was raised by a current user, using a redis external store, noticing multiple same-key request to his store.