Faster lookup for processing big sdp : proposal

Hi,
We recently went to unified-plan and I made some changes in my local to have faster code.
In particular for attributes, I created a pre check of beginning of the string (like rtmap) before calling the regex search.

Would you be interested for the addition?

Also I introduced some man made mapping for simple one to be faster+string_view.

Feel free to answer me there
Regards