'Small map' optimization: store up to a small number of key-value pairs on the stack.
Provides '1:1' API compatibility with std::collections::HashMap.
Example
usecompact_map::CompactMap;fnmain(){letmut map =CompactMap::default();// default capacity is 16
// or you can specify the capacity
// let mut map: CompactMap<&str, i32, 32> = CompactMap::default();
map.insert("a",1);
map.insert("b",2);}