Currently all models are always redownloaded each time they are needed. Would be great if the webserver could supply some information like ETags and configure some simple caching around it. That way the browser could use an old copy it already downloaded if the ETag matches.

So, i think i can add generating ETags and comparing them. Also there might be some improvement by setting and handling Cache-Control headers.

However i have tested on Chrome and Firefox (Stable and Nightly) and all browsers cached the models after one download and didn't even ask the server.

Also there already is the Last-Modified header being sent and the If-Modified-Since header being handled by the webserver.