Epoch by Fastly vs MetricsGraphics.js: What are the differences?

Developers describe Epoch by Fastly as "A general purpose real-time charting library for building beautiful, smooth, and high performance visualizations". Epoch is a general purpose charting library for application developers and visualization designers. It focuses on two different aspects of visualization programming: basic charts for creating historical reports, and real-time charts for displaying frequently updating timeseries data. On the other hand, MetricsGraphics.js is detailed as "D3-based library optimized for visualizing time-series data". MetricsGraphics.js is a library built on top of D3 that is optimized for visualizing and laying out time-series data. It provides a simple way to produce common types of graphics in a principled, consistent and responsive way. The library currently supports line charts, scatterplots and histograms as well as features like rug plots and basic linear regression.

Epoch by Fastly and MetricsGraphics.js belong to "Charting Libraries" category of the tech stack.

Some of the features offered by Epoch by Fastly are:

• Built for Developers - open source
• Real-time Charting
• Unified Styling

On the other hand, MetricsGraphics.js provides the following key features:

• Line Chart
• Multi-Line Chart
• Few Observations

Epoch by Fastly and MetricsGraphics.js are both open source tools. MetricsGraphics.js with 7.11K GitHub stars and 497 forks on GitHub appears to be more popular than Epoch by Fastly with 4.99K GitHub stars and 292 GitHub forks.