A latency-sensitive Lambda function occasionally responds slowly on the first invocation after idle periods. Which fix directly eliminates cold-start latency?
A.Increase memory allocation
Memory can reduce init duration — but the cold start still happens.
B.Provisioned concurrency — keeps execution environments initialized and warm
Correct. Warm environments = no init latency for provisioned capacity.
C.Move the function to a larger timeout
Timeout is a ceiling, not a speed control.
D.Switch to a standard SQS trigger
Trigger type doesn't remove init time.
Why this answer
Provisioned concurrency pre-initializes a set number of environments — eliminating cold starts for those instances (at continuous cost). More memory speeds INIT somewhat but doesn't remove it; SnapStart helps Java specifically.
Correct answer: B · Last reviewed 2026-10-27
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