What is more important Friendship or Duty?

In my opinion there is no definite answer to this question, but I think the duty is the priority. Usually, the one who is on duty is responsible for other people, let alone him- or herself. Thus, personal relations yet not deliberately may do harm to people who have nothing to do with those relations at all.
I believe that friendship is a feature of one’s inner world. This is why it can be a criterion of one’s personality. Russian classical literature (“The lyceum’s brotherhood” and “ to Chaadaev ” by Pushkin for example) claims friendship to be the biggest value of men’s intercommunication. Moreover, it claims friendship, honour and what more important the soldier’s duty to be the whole.
I would like to mention O’Henry(Bill Porter) himself. In terms of friendship it was all very complicated to him. There was a run of bad luck in his life, when he was accused of theft and misappropriation of banking money. Bill had to flee to Honduras in order to avoid arrest. He met Ell Jennings there, another exile, who used to be a train robber. They became close and staunch friends and many years after Ell used to help Bill (who had already become famous by that time) a lot by driving loads of blackmailers off.
In story “After twenty years” O’Henry had tried to find even if not the Answer, but the contacts between friendship and duty. Patrolman Wells’s feelings had been hidden from readers but his plain phrase in the note “somehow I couldn't do it myself” had proved that the choice he had had to make had been very difficult. If i were on his place i would probably do the same, for me, having chosen the profession of a policeman, would've meant abiding law and helping people. And cathcing a criminal even though your friend is a great contribution to common welfare, not to mention that the person you haven't seen for 20 years might have changed quite a lot. Such kind of duty like police work implies giving up one's relation bounds for greater good's sake.
It seems to me that, the meaning of notion “friendship” is personal to everyone. To me, being a friend means to be ready to help either morally or materially, to share, to give something up if you have to. But sometimes, it appears to me that, in nowadays pragmatic world the essence of the term “friendship” has been substituted by “a-stuff-that-hampers-your-business”. As a result, friendship and duty have come close enough to becoming antonyms which bring us to making the necessary moral choice.
I, personally, will try and do my best to live my life the way which will not force me to make this painful moral choice at all.