php call url without wait

https://segment.com/blog/how-to-make-async-requests-in-php/

load async

https://css-tricks.com/thinking-async/

taip pat rekomendujama sfriftus laikyti local storage http://www.sitepoint.com/improving-font-performance-subsetting-local-storage/

Load jQuery with Javascript and use jQuery

http://stackoverflow.com/questions/10113366/load-jquery-with-javascript-and-use-jquery