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by willejs 1691 days ago
Theres a high scalability post from years ago that has a bit more information. http://highscalability.com/blog/2014/3/31/how-whatsapp-grew-...
3 comments

Thanks, it does seem like choosing a language that was made for doing things in parallel to begin with was a good idea. To be honest, I've always felt that programming in functional languages creates less bugs, but perhaps that's just my imagination.
It certainly creates fewer bugs of a specific nature, depending on the language.
>19B messages in & 40B out per day

whatsapp being a closed system I don't understand how this disparity is possible.

Most people are in group chats.
this is great. wondering if Telegram also have a post similar to this? (unlike whatsapp, they do store the messages)