std::flat_multimap
std::flat_multimap is a container adapter that combines the characteristics of associative and sequence containers. It stores key-value pairs, similar to std::multimap, but with a significant distinction: the elements are stored in a flat, contiguous memory space, akin to a std::vector container. This storage approach enhances cache performance due to improved data locality, which is especially beneficial for read-intensive operations.
Purpose and suitability
Std::flat_multimap is a container within the STL that’s optimized for fast associative lookups. Its distinguishing features include the following:
- Storage in a sorted contiguous block of memory, akin to
std::vector - Allows multiple key-value pairs with identical keys
It is most suitable in the following scenarios:
- When cache locality and associative lookups are both desired
- When the dataset stabilizes post-initialization since it’s not optimized for frequent...
