Azure Functions

Expert patterns for Azure Functions development including isolated worker model, Durable Functions orchestration, cold start optimization, and production patterns. Covers .NET, Python, and Node.js programming models. Use when: azure function, azure functions, durable functions, azure serverless, function app.

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Azure Functions

Patterns

Isolated Worker Model (.NET)

Modern .NET execution model with process isolation

Node.js v4 Programming Model

Modern code-centric approach for TypeScript/JavaScript

Python v2 Programming Model

Decorator-based approach for Python functions

Anti-Patterns

❌ Blocking Async Calls

❌ New HttpClient Per Request

❌ In-Process Model for New Projects

⚠️ Sharp Edges

Issue Severity Solution
Issue high ## Use async pattern with Durable Functions
Issue high ## Use IHttpClientFactory (Recommended)
Issue high ## Always use async/await
Issue medium ## Configure maximum timeout (Consumption)
Issue high ## Use isolated worker for new projects
Issue medium ## Configure Application Insights properly
Issue medium ## Check extension bundle (most common)
Issue medium ## Add warmup trigger to initialize your code

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