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