This attack is now why browsers segment caching into a combination of requesting domain and asset URL, rather than just caching the asset on its own. It slows d

This attack is now why browsers segment caching into a combination of requesting domain and asset URL, rather than just caching the asset on its own. It slows down for example Google Fonts, but means that a site can’t check to see that you’ve visited a competitor by timing an asset load from their site to see whether it’s in the cache.