FaaS vs Fission: What are the differences?

Introduction:
Key Differences between FaaS and Fission

1. **Execution Environment**: FaaS platforms like AWS Lambda offer a fully managed serverless environment, whereas Fission provides a Kubernetes-based serverless framework which requires management of the underlying infrastructure. 
2. **Scalability**: FaaS platforms typically have auto-scaling capabilities based on demand, while Fission requires manual configuration for scalability.
3. **Cold Start Latency**: Fission often has a lower cold start latency compared to FaaS platforms due to its architecture of container reuse and warm containers.
4. **Multi-Tenancy Support**: Fission has built-in multi-tenancy support for isolating functions within a namespace, while FaaS platforms may require additional configuration for the same level of isolation.
5. **Language Support**: FaaS platforms support a wider range of programming languages compared to Fission, which is more focused on specific languages like Python, Go, and Node.js.
6. **Community and Ecosystem**: FaaS platforms like AWS Lambda have a larger community and ecosystem of tools and integrations compared to Fission, which might have a smaller user base and fewer resources available.

In Summary, Fission and FaaS differ in their execution environment, scalability, cold start latency, multi-tenancy support, language support, and community ecosystem.