Colossus vs Play: What are the differences?
Developers describe Colossus as "I/O and Microservice library for Scala". Colossus is a lightweight framework for building high-performance applications in Scala that require non-blocking network I/O. In particular Colossus is focused on low-latency stateless microservices where often the service is little more than an abstraction over a database and/or cache. For this use case, Colossus aims to maximize performance while keeping the interface clean and concise. On the other hand, Play is detailed as "The High Velocity Web Framework For Java and Scala". Play Framework makes it easy to build web applications with Java & Scala. Play is based on a lightweight, stateless, web-friendly architecture. Built on Akka, Play provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications.
Colossus belongs to "Microframeworks (Backend)" category of the tech stack, while Play can be primarily classified under "Frameworks (Full Stack)".
Colossus and Play are both open source tools. It seems that Play with 11.2K GitHub stars and 3.75K forks on GitHub has more adoption than Colossus with 1.13K GitHub stars and 99 GitHub forks.
What is Colossus?
What is Play?
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Play is a central framework/component/library (not sure what to call things these days) in Scala. We <3 Scala, and therefore we <3 Play.
Play is on of several frameworks we are prototyping and vetting for various public-facing websites, and may ultimately be the framework behind the main datapile.io website.
I used Play to build a configuration UI for the service, which let you create and manage the menus (a hierarchical tree of options and actions).