long duration of view

Hi all

I can't explain behavior of view created in user CSULFR_APP :

CREATE OR REPLACE FORCE VIEW "CSULFR_APP"."MON_V_FORMULAR_HLAVICKA" ("ID", "DATA", "DATUM_VYTVORENI", "DATUM_ZMENY", "NAZEV", "POPIS") AS
  SELECT b.tableid,
    a.preferences,
    TO_DATE(EXTRACTVALUE(XMLTYPE(a.preferences), '/portlet-preferences/preference[name="datumVytvoreni"]/value'), 'DD.MM.YYYY HH24:MI:SS') datum_vytvoreni,
    TO_DATE(EXTRACTVALUE(XMLTYPE(a.preferences), '/portlet-preferences/preference[name="datumZmeny"]/value'), 'DD.MM.YYYY HH24:MI:SS') datum_zmeny,
    EXTRACTVALUE(XMLTYPE(a.preferences), '/portlet-preferences/preference[name="title"]/value') nazev,
    EXTRACTVALUE(XMLTYPE(a.preferences), '/portlet-preferences/preference[name="description"]/value') popis