In version 2.5.3 of their iOS SDK, Mixpanel introduced a stopwatch feature that allows developers to measure the duration of events within apps, such as image uploads or user signups, to enhance user experience by identifying slow processes. This feature, known as "timeEvent," enables developers to start a timer for specific events and ensures that elapsed time is included in future tracking, even if the app is interrupted or closed. This capability provides valuable insights into app performance, helping developers identify slower app versions and detect outliers in user action times. For further technical details, updated documentation and support are available from Mixpanel.