Is your feature request related to a problem? Please describe.

The parser.load function takes a reference to a std::string which specifies the filename.

Describe the solution you'd like

Ideally if there were a version of this function which took a std::string_view then it would not be necessary to construct a std::string, thus eliminating one memory allocation.

Describe alternatives you've considered

It could also take a c_str, since the string_view will likely be constructed from a const char* anyway.

Are you willing to contribute code or documentation toward this new feature?

I can probably look into this if I have some time, but not in the immediate future. I anticipate it to be an easy change.

I can go ahead to do it. If I have missed something, or there are reasons why this change should not be made, please do make me aware.