RealWorld4 is a performance test that attempts to simulate a real-world application of reasonably large scale (eg. gmail-sized application).

The test has a few noteworthy characteristics:

• Large number of widget definitions (~150)
• Large application data model
• Widgets take in a variety of parameters
• Most widgets take in models (since models are considered best practice)
• About 10% of widgets take in unmemoizable parameters
• Widgets do some amount of work during composition
• Reads layout constraints to decide children