What is Function as a Service?
2Function as a Service (FaaS): Core Building Block of Serverless Technology
What is FaaS?
• Simplest unit of work for building applications, microservices, or event-driven protocols
• Basic workflow: Input → Logic → OutputCharacteristics of FaaS
• Simple and easily understandable
• Highly scalable
• Quick response timePopular FaaS Framework: AWS Lambda
• Can be attached to various services:
• S3 notifications (e.g., file uploads)
• SQS (Simple Queue Service) messages
• Enables building infinitely scalable services with small response timesBest Languages for Serverless/FaaS
1. Rust
2. GoAdvantages of Modern Compiled Languages for FaaS
• Speed
• Safety
• Optimal deployment characteristics
• Millisecond response and invocation times
• Low energy usageKey Considerations for FaaS Development
• Focus on maintenance over ease of building
• Optimize for low costs (financial and energy)
• Consider total cost of service over timeTakeaway
When developing Function as a Service applications, prioritize long-term efficiency, maintenance, and cost-effectiveness over initial development ease. Choose languages and practices that support these goals in a serverless environment.
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