[drtse4]

If you really want to write really performant java code, the word "spring" should not even be mentioned. Same thing for Jackson, write you own lazy json library if the data is bigger than a few 100k.

The code will not look pretty but it will be very fast.

[Tillerino]

Speaking of Jackson and performance... I have been working on Jagger for a while now, which aims to replace all that reflection during databind with annotation processing.

I am trying to aim for something like Mapstruct for the developer experience, since everybody loves Mapstruct. With Jagger, you bring a parser (JSON/XML/whatever), define some databind methods, and it generates the implementation for you.

So far I've only had my own use cases, so I would love to have some wider feedback.

https://github.com/Tillerino/jagger