Lambda and Serverless Functions — The Execution Model Explained
Understand AWS Lambda's execution model, cold starts, triggers, and how it compares to Vercel serverless functions.
Here is a strange idea: what if you could run code without owning, renting, or managing a single server? No operating system to patch. No capacity to plan. No idle machines burning money at 3 AM when nobody is using your app.
That is the promise of serverless computing, and AWS Lambda is where it started. Launched in 2014, Lambda introduced a model where you upload a function, tell AWS when to run it, and pay only for the milliseconds your code actually executes. Everything else — the servers, the operating systems, the scaling, the availability — is AWS's problem.
If you have used Vercel's API routes, you have already used serverless functions without knowing it. Lambda is the same concept with more power and more knobs to turn.
The Execution Model
Lambda's model is beautifull
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