[forty]

I think the trick is mostly not to have a shitload of dependencies. If you have to load a bunch of huge frameworks, whether it's bundled or you have to download thousands of files one by one, it's going to be slower than not doing it at all :)

[eyelidlessness]

It depends on your bundler and config. You might have “zero” dependencies, but depending on how the code is split you might end up with thousands of small imports nested quite deeply.