Alluvial value interpolation performance

[joao-m-santos]

Problem description

The current node value animation (when withTransition option is true) is very bad performance-wise. It can be noticeable if a diagram has 10+ nodes updating on an interaction.

Possible solution: https://css-tricks.com/animating-number-counters/#aa-the-new-school-css-solution

Expected behavior

Smooth transitions without noticeable low FPS

Validations

• [X] Follow our Code of Conduct
• [X] Read the Contributing Guidelines.
• [X] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• [X] Make sure this is a Lume issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/core instead.
• [X] The provided reproduction is a minimal reproducible example of the bug.

[joao-m-santos]

Update: we cannot use the CSS solution because it is not supported by Firefox.