1.5.3

March 31, 2018:

1. improved automatic discovery of external domains by using the Resource Timing API.
2. cleaned up UI by consolidating form elements and save buttons into one.
3. improved ability for preload hints 'as' attribute to be determined when user inputs data.
4. improved sanitization and overall URL entry process.
5. cleaned up the code which governs how hints are delivered from the db to the browser.
6. 'crossorigin' attribute is now determined on the back end.
7. added more detailed information to the Preload information section.
8. modified db table schema- added 5 columns: 'as_attr', 'type_attr', 'crossorigin', 'header_string', and 'head_string' for those respective attributes which browsers are getting more particular about. The last two columns are helpful for storing the specified links in the db, and delivering them very quickly to the browser.
9. the improvements above have been able to bring total PHP execution time on the front end down to around 0.07-0.1 milliseconds (that's 0.00007 seconds). Essentially I am shifting more of the calculations/computations to the back end when the user inputs data rather than the front end.