What can a developer do to optimize the initialization of the function?

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In: DVA-C01
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A company is hosting an Amazon API Gateway REST API that calls a single AWS Lambda function.The function is infrequently invoked by multiple clients at the same time.The code performance is optimal, but the company wants to optimize the startup time of the function.

What can a developer do to optimize the initialization of the function?

Enable API Gateway caching for the REST API.

Configure provisioned concurrency for the Lambda function.

Use Lambda proxy integration for the REST API.

Configure AWS Global Accelerator for the Lambda function.

Explanations:

Enabling API Gateway caching improves performance by caching responses, but it does not impact Lambda function initialization time, which is the focus of this question.

Provisioned concurrency ensures that a specified number of Lambda instances are pre-warmed and ready to handle requests, minimizing cold start times.

Lambda proxy integration simplifies the API Gateway setup but does not directly impact the Lambda function’s initialization time.

AWS Global Accelerator improves the availability and performance of applications by routing traffic to the nearest endpoint, but it does not affect Lambda function startup time.

2026-04-05

2 Comments

  1. Grace
    Author

    I suspect that the answer is:
    Configure provisioned concurrency for the Lambda function.

  2. Donald
    Author

    In my opinion, the answer is:
    Configure provisioned concurrency for the Lambda function.

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