Gradle vs Mill: What are the differences?

# Introduction 
In the world of build automation tools, Gradle and Mill are popular choices. Both tools provide robust features for managing and building projects efficiently. However, there are key differences between Gradle and Mill that developers should consider before choosing one for their projects.

1. **Build configuration**: Gradle uses Groovy or Kotlin DSL for build configuration, allowing developers to write build scripts with a more expressive syntax. On the other hand, Mill uses a Scala-based DSL for build configuration, which may appeal to developers familiar with Scala.

2. **Incremental compilation**: Gradle supports incremental compilation out of the box, which can significantly reduce build times by compiling only the necessary parts of the project. Mill also provides incremental compilation but leverages Zinc for better performance.

3. **Dependency management**: Gradle has a rich and mature ecosystem for dependency management with support for popular dependency management systems like Maven and Ivy. On the other hand, Mill has a simpler approach to dependency management, favoring the use of Scala's build tool ecosystem.

4. **Customizability**: Gradle offers extensive customizability through plugins and build script configurations, making it highly flexible for different project requirements. In contrast, Mill focuses on simplicity and ergonomics, providing fewer customization options but a more streamlined user experience.

5. **Community support**: Gradle has a large and active community with a wealth of resources, plugins, and support available. Mill, being a newer and less popular tool, may have a smaller community and fewer resources, leading to potential challenges in finding help and guidance.

6. **Performance**: Gradle has been known to have slower build times for larger projects compared to some other build tools. Mill, with its emphasis on performance and speed, aims to provide faster build times, especially for Scala projects.

In Summary, Gradle and Mill differ in their build configuration, incremental compilation, dependency management, customizability, community support, and performance characteristics, making them suitable for different project requirements and developer preferences.