C++ design: How to cache most recent used

Question

We have a C++ application for which we try to improve performance. We identified that data retrieval takes a lot of time, and want to cache data. We can\'t store all data in mem

Answer 1

As a simpler alternative, you could create a map that grows indefinitely and clears itself out every 10 minutes or so (adjust time for expected traffic).

You could also log some very interesting stats this way.