Better caching for Web bundles using Cache Digests for HTTP/2

[dunglas]

Cache Digests could be practical for Web bundles: using them, it could be possible to "Server Push" the web bundle, and the server could include in the pushed bundle only what isn't already in the cache of the browser. So we (theoretically) could have the best of both approaches; a good compression, one less RTT and a good hit rate.

Is it something we should investigate? (I initially discussed this privately with @KenjiBaheux in discussions related to the removal of Server Push from Chrome.)

[sleevi]

There are a number of security and privacy concerns with Cache Digests that make them unlikely to be implemented.

[jyasskin]

@yoavweiss and @littledan are working on a way to serve just the parts of the bundle that aren't in cache. I'll let them point at their latest design sketches.