Writing_Energy_Efficient_Apps.md

WWDC 2017

Table of Contents

• Writing Energy Efficient Apps - Friday
  • Location
  • Graphics
    • macOS:
  • Background processing
  • Navigation background mode
  • Energy debugging tools

Writing Energy Efficient Apps - Friday

Session video and resources: https://developer.apple.com/videos/play/wwdc2017/238/ Provided by @mihriminaz

Location

• Accuracy level. Be mindful about your update rate

Graphics

• Minimize screen updates

macOS:

• Minimize use of discrete GPU ( MTLCopyAllDevices - only use when animation suffers or function isn’t working)
• If you use OpenGL NSSupportAutomaticGraphicsSwitching -info.plist
• Minimize screen updates
• CPU
  • Identify tasks
  • Do work quickly and efficiently
  • Avoid timers
  • Set leeway

Background processing

• Avoid as much as possible
• Finish work quickly and efficiently
• Use background app refresh for updating content
• Use completion handler so that you complete
• New - PushKitAPI - has completion() now.

Navigation background mode

• CPU limits like workout
• Minimize Networking

Energy debugging tools

• Energy Gauges
• Debug your app for
  • Launch & idle
  • Background
• E.g: For a navigation app: debug for,
  • Search for and address
  • Get directions
  • Navigate