Website Performance boosting Tips

1.) If same data is required among multiple users, Caching can be used. Cache stores the data on application server's cache memory. So each time when a request is made the data will come from cache memory than Database.Example, On a particular page load you want a grid of multiple records to be loaded and data to display is same for all the users.In such scenario you can place the data in cache memory. It will boost the performance to a certain height.
2.) Make JavaScript and CSS external.Make internal only if they are too small.
3.) Bundling and minification - it will club all the script and css files into bundles. Example : if there are 10 JS files, if you create a single bundle server will hit once instead of 10 times to get these files.Same is the case with CSS. Besides it will minify your files, meaning will remove unnecessary spaces and line breaks.
4.) If not using Bundling, atleast go for minification on production.You can minify your files online.There are lots of online converters for the same.
5.) Use compressed images.Make use of Image Sprites, which allow you to combine several images into one. From there, you can use CSS to extract the portion of the combined image to render .It will also reduce HTTP request count.
6.) Place all scripts at bottom of page right before closing of body tag ().But keep CSS file links in head of element
7.) If you are using some scripts from some CDN, then use their online path instead of downloading to local and placing in your project. The reason behind this is, most of the time our browsers have already visited the sites that are referencing to such scripts and they are already cached in our browser.
8.) Async: Make use of this keyword for those JS files that you can allow to download in background.
Example:

<script async src="myfile.js" />