The tips for improving the speed of a website is given below
Create the content with fewer HTTP requests and also reduce too many Redirects and DNS Lookups.
In the server, use Content Delivery Network (CDN) for boosting up the speed of the website. And also, configure ETags and use GET for Ajax Requests.
Reduce the size of the cookie and also use cookie-free domains for components.
Avoid filters and CSS Expressions for boosting the speed performance. And also, keep stylesheets at the top.
To boost the speed of the website, keep the components under 25KB size and also pack components into a multipart document.