Are you sure everything has been fetched and processed? Some times this happens dynamically. Compare jank to an electron app where all artifacts are preloaded

Are you sure everything has been fetched and processed? Some times this happens dynamically. Compare jank to an electron app where all artifacts are preloaded and preprocessed. To balance that, I've also seen jank in native mobile apps where developers haven't properly used the background thread, or done something strange in interface builder where the constraints don't solve properly. > in pulling in quadratically more dependencies, negating all performance improvements instantly Adding a lot of dependencies will affect memory consumption which may have knock-on effects due to paging if your system is low on memory, but that aside it's what and how much code is executed per frame that matters to speed. Dynamic memory allocation and garbage collect are probably the culprits you're searching for, but improvements of javascript engines and framework libraries have largely negated this issue for most websites.