Does Dexie support any in-memory data storage or caching?

[tomkennedy22]

Hey all, I've been using Dexie for quite some time and really enjoy the product.
In my web app using Dexie, I jump around many functions and read & write to the same Dexie tables quite often. These functions are discrete and run asynchronously.
In my use, some tables have 10k+ rows, so reading & writing often can take some time. I was wondering if there's any functionality, either now or planned, that may assist with this. Being able to store data in-memory and query from there using the same Dexie syntax would be cool, and faster. And then there could be a 'write' trigger to sync from in-memory to disk.

I know there are some packages out there right now that do similar things, but I do like Dexie a bit, so am not motivated to move.

Thanks!

[dfahlander]

Hi! Thanks for sharing your thoughts!

Dexie 4 is planned for start using caching for non-transactional readonly queries. I've written a few words about it on the road map page. Having dexie being backed by in-memory data only is also a valid use case for testing etc. Today this can be accomplished using fake-indexeddb but it would probably be nice if it was built-in, or if there would be possible to do an addon for it, such a a memory-backed DBCore (would be possible to implement already, but it's not possible to replace the database opening / upgrading parts yet).

[tomkennedy22]

Thanks @dfahlander, makes sense. I was looking around and found LokiJS to cover some caching capabilities, although I'm not sure that it is maintained any longer.

Looking forward to Dexie 4! Thanks for all of your work!