How to actually work on web application performance

When we google "how to improve the speed of a web application," we usually find the same set of practices-"compress everything you can compress" or "divide the code into chunks." 

But if you've already done all that, can you improve more? There's no silver bullet here, because you have to do some research into the performance of your particular application. The speaker will talk about the concepts, approaches, and problems that came up in their Auto.ru team while solving this problem.