3 ms·
https://www.facebook.com/notes/facebook-engineering/building-facebook-messenger/10150259350998920/ https://www.facebook.com/notes/facebook-engineering/building.
by pmlnr 11y ago
https://www.facebook.com/notes/facebook-engineering/building-facebook-messenger/10150259350998920/ https://www.facebook.com/notes/facebook-engineering/building...