What is provisioned concurrency?
A setting that keeps a chosen number of execution environments initialised and ready, so requests hit warm instances. It removes cold starts for that capacity at a steady cost, so it suits latency-critical, predictable traffic, not rarely used functions.
Answered in
Serverless Cold Starts Explained: MicroVMs, Snapshots and What You Can ControlWhy a function's first call is slow, how microVMs and snapshot restore cut it, and the code and config choices that shrink cold starts on your side.
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