website containing forum and chat should be developed in Java or Python or PHP? -

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i want develop website contains forum , live chat , chatrooms. now, should develop using java or python? have experience in java , php, jsp webpages slower compared others? web application contain live chat , chat rooms. now, there load on server, , don't want break down or go slowly, what's advice me?

please don't advise me develop in language familiar with. website important me, open learning new technologies.

the live chat/chat rooms present in website.

find open source implementation of site close need, , modify necessary. don't disappointed if written in language know!


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