F14FastMap release memory

[xiaowk5516]

I use F14FastMap to store some key-value data. I found the memory was not released after I released some key-value. So what is the reason and how can I release the memory which is unused.

[xiaowk5516]

If the value is std::share_ptr and points to a bit struct, does F14FastMap keep the memory of this big struct or the shared_pre or when we erase a key.