Comment by andrewbarba

How could you possibly say this is doing it wrong? The only way you could batch requests in the way you describe is if you have 1 (or very small number) compute nodes. You would need all those requests to hit same node so you could try and batch. With serverless compute infrastructure (which is what this blog is demonstrating by using lambda) you can have 1 isolated process per request and therefore need a database that can actually handle this kind of load.