Question

A developer has a Lambda function that resizes and compresses uploaded images. During testing, the function frequently fails with a timeout error, and CloudWatch metrics show that duration is consistently hitting the configured 3-second limit even though the task is purely CPU-bound image processing. The function is currently configured with 128 MB of memory. What is the MOST effective change to reduce execution time?

Accepted Answer

Increase the function's memory allocation, which proportionally increases the CPU power available to the function.

Answer

Enable provisioned concurrency so the function has pre-initialized execution environments.

Answer

Increase only the function timeout to 15 minutes so the processing has time to complete.

Answer

Attach a Lambda layer containing an optimized image library and leave memory unchanged.