Meilisearch Is Too Slow

> We aim to make Meilisearch updates seamless. Our vision includes avoiding dumps for non-major updates and reserving them only for significant version changes. We will implement a system to version internal databases and structures. With this, Meilisearch can read and convert older database versions to the latest format on the fly. This transition will make the whole engine resource-based, and @dureuill is driving this initiative.

Seamless upgrades has been my dream for Meili for a while, I'm still hoping I can smuggle it with the indexing refactor itself :-)