I believe there is a common misconception that this is an actual solution to the problem of cold start latencies. You can attempt to keep between 1 and X insta

I believe there is a common misconception that this is an actual solution to the problem of cold start latencies. You can attempt to keep between 1 and X instances of a lambda function running, however the underlying provisioning system is mostly a black box without published details and supposedly not entirely deterministic. Keeping a single instance of the function running isn't going to give great control over the tail on latencies. This is particularly true when faced with bursty, inconsistent traffic patterns.