Function as a Service (FaaS): Core Building Block of Serverless TechnologyWhat is FaaS?* Simplest unit of work for building applications, microservices, or event-driven protocols * Basic workflow: Input → Logic → Output
Characteristics of FaaS* Simple and easily understandable * Highly scalable * Quick response time
Popular 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 times
Best Languages for Serverless/FaaS1. Rust 2. Go
Advantages of Modern Compiled Languages for FaaS* Speed * Safety * Optimal deployment characteristics * Millisecond response and invocation times * Low energy usage
Key Considerations for FaaS Development* Focus on maintenance over ease of building * Optimize for low costs (financial and energy) * Consider total cost of service over time
TakeawayWhen 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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