# Parallel computing in ReactJS User is working with your application, suddenly, UI freezes and probably, one of the CPU cores is burning! They cannot do anything. The only perception you can feel is as hot as a hell metal case of the laptop. Although this sounds like a horror movie, this is your application that cannot leverage modern APIs to lift heavy computation to a different thread where consequently user suffers the pain.
In this session, I am going to show my experience running jobs in parallel on a React.Js application that will provide a pleasant user experience and exciting development.
Majid Hajian Majid Hajian is a passionate software developer with years of developing and architecting complex web and mobile applications. He is passionate about web platform especially flutter, IoT, PWAs, and performance. He loves sharing his knowledge with the community by writing and speaking, contributing to open source and organizing meetups and events. Majid is the author of "Progressive web app with Angular" book by Apress and "Progressive Web Apps" video course by PacktPub and Udemy. He is (co)organizer of a few mobile and web meetups in Norway as well as Nordic conferences for mobile and Angular, Mobile Era and ngVikings.