Dashboard runs very slow: how can I speed it up?

[saSerrano]

I've been trying to visualize a single CSV file with dashboard. I've tested dashboard with google chrome (version 85.0.4183.121) and firefox (version 81.0). In both browsers, dashboard takes very long periods of time to plot a single graph (e.g., discounted reward) and to respond to GUI events, such as when I press a button or drag the scroll bar of the data box. Furthermore, this happens even when dashboard is the only application I'm running on the PC. Here are my PC specs:

• OS: Ubuntu 16.04.7 LTS
• RAM: 8GB
• Processor: i7 5th gen.

Is there a way to speed it up?

Thanks in advance.