As Scott is saying, simple (Page-by-page basis) cache logic would be difficult in system where data changes frequently such as Q2A. However, I think cache would be possible. That's just not yet been developed. In fact, there is a theme that has achieved partial cache. Q2A core is very fast. However, theme degrades the performance of the Q2A. Many developers know that. In short, there is a need for logic to finely control the data that can not be and can be cached data. Moreover, it may also be cached by using the time difference. Anyway, it is necessary to advanced skill. Only Gideon might be able to develop feature as Q2A core.