SqliteQuery: Log COUNT request & request duration

src/database/SqliteQuery.h

@@ -59,8 +59,12 @@ public:
         std::string req = "SELECT COUNT() " + m_base;
         auto dbConn = m_ml->getConn();
         auto ctx = dbConn->acquireReadContext();
+        auto chrono = std::chrono::steady_clock::now();
         sqlite::Statement stmt( dbConn->handle(), req );
         stmt.execute( m_params );
+        auto duration = std::chrono::steady_clock::now() - chrono;
+        LOG_DEBUG("Executed ", req, " in ",
+                 std::chrono::duration_cast<std::chrono::microseconds>( duration ).count(), "µs" );
         auto row = stmt.row();
         row >> m_count;
         assert(stmt.row() == nullptr );