[querier] introduce RepeatList class, used to optimize size of data returned for result set description When rql query has no ambiguity, we used to return the same description * N where N is the size of the result set. Returning RepeatList class avoid that multiplication. According to quick benchmark this improve performance for result set whose size is ~ > 50, has very small penalty for rset < 50, and in any case improve the size of data to be transfered over the network through pyro connection.

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# some entities have been added before schema entities, fix the 'is' and

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# 'is_instance_of' relations

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for rtype in ('is', 'is_instance_of'):

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    sql('INSERT INTO %s_relation '

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        'SELECT X.eid, ET.cw_eid FROM entities as X, cw_CWEType as ET '

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        'WHERE X.type=ET.cw_name AND NOT EXISTS('

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        '      SELECT 1 from is_relation '

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        '      WHERE eid_from=X.eid AND eid_to=ET.cw_eid)' % rtype)