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An app may draw the same pixel more than once within a single frame, an event called overdraw. Overdraw is usually unnecessary, and best eliminated. It manifests itself as a performance problem by wasting GPU time to render pixels that don't contribute to what the user sees on the screen.

Prerequisite

• Complete (Part 1 of 2) task.

Steps

• Analyze all the overdraws found during inspection phase in Part 1 of this task.
• There are several strategies you can pursue to reduce or eliminate overdraw, such as:
  • Removing unneeded backgrounds in layouts.
  • Flattening the view hierarchy.
  • Reducing transparency.
• Implement the strategies and reduce the overdraws.

Work Submission

• Submit a pull request reducing the overdraws.
• Submit a doc file documenting the overdraws and steps taken by you to reduce them.

Resources

• • Ask any questions in #powerup on Systers Open source Slack.
• Reference article