4bb5cb52a6
This includes an optimization to the get_bundle_version_files_cached method, which is used very often when loading blockstore data; it was previously being cached only in a process-local cache (lru_cache). My hunch is that in production, with many appservers and LMS workers and frequent deployments and a large number of bundles, the process-local cache is not being hit very often. I also increased the MAX_BLOCKSTORE_CACHE_DELAY from 60s to 300s; this reduces the frequency with which we check if either (A) an external system modified the blockstore bundle and/or (B) we have a cache invalidation bug somewhere. I am increasing it because that check is more expensive than I thought (calling blockstore API to ascertain latest version of a particular bundle), and I haven't seen any cache invalidation errors that this would help to work around. (Plus, increasing this will make such bugs more obvious.)
Open edX -------- This is the root package for Open edX. The intent is that all importable code from Open edX will eventually live here, including the code in the lms, cms, and common directories. If you're adding a new Django app, place it in core/djangoapps. If you're adding utilities that require Django, place them in core/djangolib. If you're adding code that defines no Django models or views of its own but is widely useful, put it in core/lib. Note: All new code should be created in this package, and the legacy code will be moved here gradually. For now the code is not structured like this, and hence legacy code will continue to live in a number of different packages.