What is the most efficient way to draw the chart in iOS UI?

The most efficient way to draw charts in iOS UI is by using the new vectorized plot API in Swift Charts. This API allows Swift Charts to process larger collections of data more efficiently by styling the entire collection of data points homogeneously. Here are some key points to consider:

1. Homogeneous Styling: Use the same element properties for x, y, foreground style, and other visual attributes across the entire dataset. This reduces the need for individual customizations and makes rendering more efficient.

2. Vectorized Plots: For larger datasets, use vectorized plots like rectangle plots. These are optimized for performance and can handle large amounts of data more efficiently than individual mark customizations.

3. Avoid Computations During Rendering: Convert computed properties to stored properties to avoid unnecessary computations during rendering. This can significantly improve performance.

4. Group Data by Style: Group your data by the style you use for them to reduce the number of style alternations Swift Charts has to process.

5. Skip Unnoticeable Customizations: For large datasets, some style customizations may be unnoticeable. Skipping these can make your chart even more performant.

For more detailed information, you can refer to the session Swift Charts: Vectorized and function plots at the timestamp 11:29.

Relevant Sessions

• Swift Charts: Vectorized and function plots
• What’s new in SwiftUI