Ajax results time depends on server response time and DataBase structure. Our theme does not have options to improve the results time because it’s related to how fast your server (DB) sends the response to requests made by the theme. Try to improve the DB structure and speed up the server response time to get better results. So, contact your hosting provider and ask them to reduce the server response time.
From our side, we would recommend you to check this article – https://xstore.helpscoutdocs.com/article/100-how-to-speed-up-my-website
We are constantly working on the speed of the theme. We are working on the speed of the frontend itself now. When we finish the work we will start the admin part (customizer). Many things need to be considered, such as tests and the inheritability of updates. We can promise you one thing – the most customizable theme with superb performance very soon. All should be step by step to avoid problems and make all gentle.
Regards