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Why your Lambda cold starts are slower than they need to be
💡 Slim down your deployment package and use Provisioned Concurrency strategically to beat Lambda cold starts.
Every time AWS spins up a new Lambda instance, it has to download your code, set up the runtime, and run your initialization code. This is the infamous cold start.
For Python and Node.js, cold starts are typically 100-500ms. For Java or .NET, they can hit 3-10 seconds. But there's a trick most people miss: keep your deployment package small. Every extra MB of dependencies adds time.
Another game-changer: Provisioned Concurrency. It keeps instances warm and ready, eliminating cold starts entirely — but you pay for it whether requests come or not. The real pro move? Use it only during peak hours with scheduled scaling.