A report says the app is slow only for users in one region, but the server metrics look normal. What would you measure in the app's network layer to split the cause into DNS, connect, TLS, server wait, and transfer?
Collect DNS, connect, TLS, TTFB, and transfer time per request from URLSessionTaskMetrics and aggregate by region and network type, and the app can tell which phase is slow.
NetworkingMultiple choiceBasics
Select all the statements that correctly describe HTTP/2 compared with HTTP/1.1.
#http2
ConcurrencyMultiple choiceBasics
The user tapped a button and is waiting for the result, and you want to send JSON parsing…
#priority
ConcurrencyShort answerBasics
In Swift Concurrency, when you create a Task { }, when and where does that code run?
#priority
CS fundamentals and algorithmsShort answerAdvanced
On a cold start, your app's first API response takes 800ms and every one after that takes…
#urlsessiontaskmetrics