The algorithm used in Giraffe, a React-based visualization library for InfluxDB Cloud 2.0, is the Ramer-Douglas-Peucker Algorithm, which reduces complex lines to fewer points while maintaining visual quality. This algorithm is useful for fast rendering of time series data, such as those found in InfluxDB and Chronograf, enabling quick analytics, real-time monitoring, and immediate action by reducing redundant points and computationally exhaustive rendering. The algorithm's effectiveness is demonstrated through examples, including interactive visualizations and beautiful Giraffe visualizations in InfluxDB Cloud 2.0, showcasing its ability to quickly render line plots, scatter plots, and other visualizations without sacrificing accuracy or detail.