JPM/HM: Use long fields for join facet
JPM/HM: joinhash.* field as join field
JPM/HM: Use FieldCache for loading idFieldName; Not storing joinhash.* fields;
HM/JPM: simplified with another +/- 20% speed-up
HM/JPM: more optimizations (keeping IdSet per 'other' core).
HM/JPM: fastest yet; trying a new experiment
JPM/HM: Removed experiment which is a little slower
JPM/HM: Error on not a numeric field
HM/JPM: optimized (skipping unnecessary work), simplified and renamed
JPM: removed more unused imports
HM: Removed print; bignum 100000