|  | @@ -195,7 +195,7 @@ downloadresultcode::RESULT MultiUrlRequestInfo::execute()
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				|  |  |        e->getCookieStorage()->saveNsFormat(option_->get(PREF_SAVE_COOKIES));
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				|  |  |      }
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				|  |  |  
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				|  |  | -    std::string serverStatOf = option_->get(PREF_SERVER_STAT_OF);
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				|  |  | +    const std::string& serverStatOf = option_->get(PREF_SERVER_STAT_OF);
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				|  |  |      if(!serverStatOf.empty()) {
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				|  |  |        e->getRequestGroupMan()->saveServerStat(serverStatOf);
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				|  |  |      }
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