CPU usage spikes to 700% on arm64-darwin after updating to tailwindcss-rails 4.4.0

[tatsukikitamura]

Running bin/rails tailwindcss:watch causes extremely high CPU usage (around 700%) on an arm64-darwin (Apple Silicon) machine after a recent update.

This issue started occurring after upgrading:

tailwindcss-ruby from 3.4.17 to 4.1.16

tailwindcss-rails from 3.3.2 to 4.4.0

The previous versions did not exhibit this behavior.

Environment

・tailwindcss-rails: 4.4.0
・tailwindcss-ruby: 4.1.16 (arm64-darwin)
・Rails: 8.0.3
・Ruby: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [arm64-darwin25]
OS: macOS (Apple Silicon / arm64)