It’s too slow when variations are present

Hi.

Would there be any chance of you adding some caching or even better fixing the code so it will not be that slow?
When I pick a category of products where are variations, it takes 15+ seconds to load and returns request 5 MB big, where the most of the data seem not to be used in any way.
This category has 5 products, 3 of those have aprox. 300 variations.