The Serverless Revolution

Stop managing servers. AWS Lambda allows you to run .NET code only when it's triggered, and you only pay for the milliseconds it executes.

1. Cold Starts

The 'Boogeyman' of serverless .NET. When a Lambda hasn't been run for a while, AWS must 'spin up' a container, which can take 1-3 seconds for a standard .NET app. **Architect Solution:** Use **Native AOT (Ahead-of-Time)** compilation in .NET 8. It reduces cold start times from seconds to milliseconds by pre-compiling the binary to machine code.

2. Triggers

Lambdas don't just sit there. They are triggered by **API Gateway** (Web requests), **S3** (File uploads), or **SQS** (Queue messages). This event-driven model is the core of modern cloud architecture.

3. Architect Insight

Q: "When is Lambda too expensive?"

Architect Answer: "If your app is running 24/7 with consistent high traffic, the per-request cost of Lambda will eventually exceed the cost of a flat-rate EC2 or Fargate instance. Lambda is for **Spiky** or **Low-to-Medium** traffic. The 'Goldilocks' zone is where the complexity of managing servers costs more than the Lambda premium."