⚡ Serverless Functions - Provider Comparison

Introduction

Serverless functions let you run code without managing servers. Pay only for execution time, with automatic scaling.

Quick Comparison

AWS Lambda

exports.handler = async (event) => {
  console.log('Event:', JSON.stringify(event, null, 2));
  
  return {
    statusCode: 200,
    body: JSON.stringify({ message: 'Hello from Lambda' })
  };
};

Strengths:

• Largest ecosystem

• 15+ supported runtimes

• Extensive trigger options (100+)

• Container image support

Pricing: $0.0000002 per invocation + $0.0000166667 per GB-second

GCP Cloud Functions

exports.helloWorld = (req, res) => {
  res.send('Hello from Cloud Functions!');
};

Strengths:

• Simple deployment

• Integrated with GCP services

• Lower cold start

• Fast iteration

Pricing: $0.40 per 1M calls + $0.0000041667 per GB-second

Azure Functions

module.exports = async function (context, req) {
  context.log('Function invoked');
  
  context.res = {
    body: 'Hello from Azure Functions'
  };
};

Strengths:

• Azure ecosystem integration

• C# support

• Durable Functions for complex workflows

• Flexible deployment options

Pricing: $0.20 per 1M calls + $0.000016 per GB-second

Firebase Cloud Functions

const functions = require('firebase-functions');

exports.helloWorld = functions.https.onRequest((req, res) => {
  res.send('Hello from Firebase!');
});

Strengths:

• Tight Firebase integration

• Automatic scaling

• Real-time database triggers

• Simple authentication

Pricing: $0.40 per 1M calls + compute time

Trigger Types

Key Takeaways

• **Lambda:** Most powerful, most options

• **Cloud Functions:** Simplest, lowest cold start

• **Azure Functions:** Best for .NET, most flexible

• **Firebase:** Best for Firebase apps

• **Pricing similar:** Execution cost varies slightly

• **Cold start matters:** For latency-sensitive apps

• **Timeout limit:** 15min (Lambda) vs 9min (others)

• **Cost optimization:** Use caching, minimize execution time