I am doing search functionality using drop-down with search button. When i select option from choose a category, its related data show in next drop-down choose your location but its take 2 or 3 second and reflect on next drop-down. How can i make it smooth without any problem.
I follow one document but not remember right now.
I setup this search functionality on home page : hidden link
Your server settings all look good and don't explain the slow response time. (When you change the first dropdown an ajax request is submitted to the server and Views performs a query to update the results as well as the options which should be included in dropdowns, and checking the network request with the browser tools showed this taking about 4 seconds, which is longer than expected.)
Can we try this again with the non-Toolset plugins disabled and switching to twentynineteen theme?
If you let me know when you've done that I can inspect the request again in the browser dev tools.
As per your guideline, i change the theme from Ultimatum to Twenty Nineteen and inactive non-Toolset plugin. But same thing is happen. Please check the website link : hidden link
I can see that it is slightly quicker, but not much.
The next thing I would like to try is making a copy of your site and installing it on another server to compare, if that's okay.
I will mark your next reply as private so that I can get log-in credentials from you—you may want to create a temporary admin user for me to use that you can later delete. And be sure to have a current backup of your site, even though I don't intend to make any changes other than to temporarily add a backup plugin to take a snapshot of the site.