You have built this amazing React application with lots of components and everything works smooth but somehow, it feels slugish at certain places. You got that nice lazy loading that the stakeholder wanted but it slows everything down over time. Now, how would you go ahead and improve this? Let’s have a look at profiling a React application! Your customer has been bothering you for weeks about his project TortoiseBook, and it is nearly finished, but, the most recent complaint was about performance issues!