[Question] Why is it recommended to re-use the same instance throughout the entire app?

[techgerm]

After reading through the differences between react-native-mmkv and react-native-mmk-storage (detailed in this thread), I've chosen react-native-mmkv for my next project but there's a stark difference that seems rather important:

In the react-native-mmkv docs, It is recommended that you re-use this instance throughout your entire app instead of creating a new instance each time, so export the storage object.

But in react-native-mmkv-storgage, it's recommended that you create separate instances per module for better performance since each database instance is small instead of a single bulky database which makes things slower as it grows.

Link here: https://rnmmkv.vercel.app/#/?id=create-unlimited-database-instances

So for this library, if the recommendation is a single instance then does that mean a single bulky database which makes things slower as it grows is not a problem here?

Thanks in advance for your response!

[mrousavy]

Hey, it will be faster since it is all in memory in one instance.

It depends on your use-case, but I'd be interested in seeing performance differences if you do a perf comparison!

[techgerm]

@mrousavy okay thanks for the quick response!