As VMs get faster, people will stuff more JS in pages, just because it's doable. Some things were not even possible and were "unlocked" by browser optimization

As VMs get faster, people will stuff more JS in pages, just because it's doable. Some things were not even possible and were "unlocked" by browser optimizations. For example: writing games or complex animations with JS and the DOM was nearly impossible (that gap was filled with flash). As browsers got faster, the need for flash just went away. Also the more APIs the browsers ship, the more is possible to do with JS, and so the pages ship more JS to use these new featuers. [1] For example: after browser notifications became broadly available, almost _all_ pages ship now a snippet of JS code to annoy the user with notifications. I'm sure such fads blow up the average size of bundled JS across all web pages. [1] Look at this! https://developer.mozilla.org/en-US/docs/Web/API https://developer.mozilla.org/en-US/docs/Web/API