AWS Lambda: Cold Start Duration per Instance Size
AWS Lambda has a setting to define the memory size that gets allocated to a single instance of a function. The CPU resources are allocated proportionally to the memory. So, in theory, larger instances could start faster.
However, there seems to be no significant speed-up of the cold start as the instance size grows.
None of the charts shows a considerable advantage of larger instance sizes for the cold starts.
Go back to Cold Starts in AWS Lambda.