If you’re worried about server load when it comes to fetching time series data, you won’t have to with Cubism. Cubism fetches data incrementally, and only polls the most recent data values thereby reducing server load.
Cubism allows you to see more metrics at a glance compared to standard line and area charts because it uses a more space-efficient time series visualization technique known as horizon graphs or charts. It favors per-pixel metrics, which means it increases data density where each pixel encodes a distinct point in time.
Cubism is available under the Apache License. For a more in depth look at Cubism.js and for further reading, just head on over to its official GitHub page.