Changeset 5120 for trunk/src/core/net/sf/basedb/core/snapshot

References #1374: Caching of experimental factors

The cache is now working. #1400, #1401 and some other enhancements indicate that the initial caching can be 2-3 times quicker than the old code. The performance gain with the cache seems to be about 5-7 times. The end result is about 15-20 times quicker than the old code. Note that this was for a very simple experiment with 4 raw data sets and 5 experimental factors and almost no other data in the database. This should be tested in real-world scenario.

IMPORTANT NOTE!! Cache invalidation has not yet been implemented. What goes into the cache stays in the cache. Updates and changes to annotations will not be visible!