[Xapian-devel] 回复: about sort_by_value

没有锂称 373784273 at qq.com
Wed Mar 26 03:52:57 GMT 2014

Thank you very much for your reply. My English is not very good, maybe I did not describe the problem clearly.
I need to return 10 results, but Circulation of 16800 times in the code,so it is time-consuming. 
Can a one-time reading all the value, sort later return to the previous 10?
I'm using version 1.2.17. my code like this: 
 for (int i = 0; i <16800; i + +) {
  Xapian :: Document doc;
  char buf [256];
  snprintf (buf, sizeof (buf), "% d", i);
  doc.add_term ("term");
  doc.add_value (200, buf);
  docid = db.add_document (doc);
 Xapian :: Database db ("../Data..");
 Xapian :: Enquire eq (db);
 Xapian :: Query query ("term");
 eq.set_sort_by_value (200);
 eq.set_query (query);
 boost :: timer :: cpu_timer st;
 Xapian :: MSet mset = eq.get_mset (0, 10);
In my actual code, also used the AND,  and database is 25G, so consuming 25ms. 
 How to use, can make sorting faster?  thanks!
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