admin-ajax.php is slow
55448
Ajax takes 10x as long as it should/could
74091
does anyone knows good ajax script loader
62569
Ajax loading seems to be more updated than the actual home page
80611
Processing large JSON files in PHP
2845
How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?
61839
Prevent browser caching of AJAX call result
95518
Large update taking too long; looks like it is updating more records than I have
115519
How can "set timestamp" be a slow query?
36205
PHP Ajax Upload Progress Bar
120062
Fastest Way to Serve a File Using PHP
55129
How to improve load time when Pingdom says 80% of the load time is the web browser waiting for data from the server?
13746
SQL query takes too long to run, asp.net stops responding
106407
PHP/Apache/AJAX - POST limit?
149545
JQuery Ajax Request: Change User-Agent
143087
How to force page not to be cached in PHP?
17648
Optimizations to reduce website loading time
134182
How can I optimize a mysqldump of a large database?