Tickets :: Comment on [#14075] Large mailboxes takes many seconds to load and causes CPU at 100%

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Comment	> The library in question is Horde_Imap_Client. > > The class where the performance problem reside is > Horde_Imap_Client_Data_Thread. > > And the method causing the high CPU usage is _getAllIndices(). > > This method uses a simple iteration through _thead array (in my case > having 8088 elements) and merges the keys of each sub-array with the > previous one. So it calls array_merge and array_keys 8088 times: > > protected function _getAllIndices() > { > $out = array(); > reset($this->_thread); > while (list(,$v) = each($this->_thread)) { > $out = array_merge($out, array_keys($v)); > } > > return $out; > } > > I replaced this iteration with this and the performance issue were gone: > > protected function _getAllIndices() > { > return array_keys(call_user_func_array('array_replace', > $this->_thread)); > } > > Hope it helps and best regards, > > Cristiano da Cunha Duarte
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