The problem is that the only way to get more CPU, you need to assign more memory to lambda. Most node.js lambdas would have stable idle/low memory usage around

The problem is that the only way to get more CPU, you need to assign more memory to lambda. Most node.js lambdas would have stable idle/low memory usage around 200MB but you get ~1/9of vCPU core, this have severe impact performance. You are forced to overprovision lambdas with more memory, even then performance is still very much a disappointment. People that sold promise of serverless framework should have a special place in hell.