shess b6a75606ed Change prefix search from O(N*M) to O(NlogM). The previous code
linearly merged the doclists, so as the accumulated list got large,
things got slow (the M term, a fucntion of the number of documents in
the index).  This change does pairwise merges until a single doclist
remains.  A test search of 't*' against a database of RFC text
improves from 1m16s to 4.75s. (CVS 4599)

FossilOrigin-Name: feef1b15d645d638b4a05742f214b0445fa7e176
2007-12-07 23:47:53 +00:00
..

This folder contains source code to the second full-text search
extension for SQLite.  While the API is the same, this version uses a
substantially different storage schema from fts1, so tables will need
to be rebuilt.