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iOS Data Visualization Library

1 post · Apr 2024

What this trail covers

Datadog developed and continues to evolve DogGraphs, an internal iOS graphing library built with Swift and SwiftUI, to bring complex data visualizations to the Datadog mobile application and widgets. The library focuses on ease of use, a flexible API, default Datadog styling, and high-performance rendering, supporting various widget types and data sources. Recent efforts have concentrated on optimizing SwiftUI rendering pipelines, identifying and fixing performance bottlenecks through tools like Xcode Instruments, and leveraging private APIs like _printChanges() for debugging.

All Datadog trails
  1. How we brought Datadog’s data visualization to iOS: A focus on performance | DatadogThis post details the performance optimization efforts for Datadog's internal iOS graphing library, DogGraphs. It explains how the team used Xcode Instruments and the private _printChanges() method to identify and address SwiftUI view body evaluation bottlenecks. Specific optimizations included moving expensive logic out of View bodies and analyzing time profiler data to optimize slow function calls during key interaction events like initial rendering, window changes, and user interactions.