Caching node information in yaml (I figured caching in memory will cause ever-larger memory growth), and changing the external node terminus to use the version of the facts as their version. This will usually result in the cached node information being used, instead of always hitting the external node app during file serving. Note that if the facts aren't changed by the client, then this will result in the cached node being used, but at this point, the client always updates its facts. (#1130)