unordered map - choosing a key type for a path

Question

I would like to store a data (for simplicity let's assume that it will be integer id) in unordered_map based on the resource path. Here is an example function - a path is sent as const char*. The straightforward approach is to use std::string as a key:

std::unordered_map<std::string, int> ids;

void load(const char* path)
{
    const int id = generateId(path);
    ids[path] = id;
}

Paths may be too long for SSO. How can I optimize that code in C++17 ? Should I use string_view as a key:

std::unordered_map<std::string_view, int> ids;

?