ZF-4364: Using SkipData info to improve search performance


Each term within an index has a list of matched documents. This list may be large enough and it may take a long time to load it.

This list also has some additional subindex known as "skip data". This info allows to check directly if some document matches specified term.

Zend_Search_Lucene should use skipData to optimize search performance.

That may be done by reordering of subsearches execution.


I believe this was implemented for 1.7. If not, please reopen, Alex.