Recently we made an investment to improve the performance of our intranet. We made many changes in different layers: SQL, Network, Browser upgrade and code. Here I want to tell about what code changes we did to improve the web browser performance. Please leave feedback if you find it useful. You can also share your suggestions. We measured the performance before our code changes and after them. We had amazing results. Unfortunately I can not share any numbers, but we improved the Time to First Byte, time to load event firing in the browser, memory consumption in the clients and, perhaps, the most important, we improved the perceived performance of the Intranet, the way how users experience the speed and UI responsiveness. To do this I got many ideas of my project colleagues and branch colleagues. Here is the list of changes we’ve implemented: