Resolution: Not A Problem
Affects Version/s: 4.0
Fix Version/s: None
lengthNorm method of DefaultSimilarity is following:
The retrun value is decided by (1.0 / Math.sqrt(numTerms)).
The type is float, but this value is encoded to byte length by SmallFloat.floatToByte315.
|term count||1/sqrt(numTerms)||1/sqrt(numTerms) to byte|
The length norm of 3 terms is the same as that of 4 terms.