In this talk, we’ll take a look at unruly or uninvited (third-)party guests: how to detect them, how to audit them, and how to manage them. We’ll also look at the different tools available to help us stress-test and quantify the overhead these third parties bring, and what that means for users and businesses alike.

There is a clear pattern of environmental properties having the worst correlation: Effective connection type, device memory, available CPU, page transfer size. This might suggest that users are aware of their device, network quality and page size (small vs big article in Wikipedia's case) and adjust their expectations to those factors.

HTML and CSS are just more resilient than JS. […] Use polyfills, use progressive enhancement: use JavaScript responsibly.

Our current generation of frameworks makes off-main-thread architectures hard and diminishes its returns. UI frameworks are supposed to do UI work and therefore have the right to run on the UI thread. In reality, however, the work they are doing is a mixture of UI work and other related, but ultimately non-UI work.