Building web applications to power the refugee aid movement results in some interesting performance considerations. Will it load on a refugee camp’s wifi, shared by 500 people and beamed in from a town 4km away? Can it work offline, so that aid workers in the field can still get their job done even if they lose cell signal? Will it run on anything from a decade old donated laptop running Windows Vista to a brand new iPhone X? This talk will discuss performance considerations, explore tradeoffs, …