What is the primary advantage of using AWS Lambda Layers?

The primary advantage of using AWS Lambda Layers is that they allow for easier sharing of code among multiple functions. Layers enable you to package and manage common code dependencies separately from the function code itself. This modular approach means that you can create a layer with shared libraries or code that can then be reused across different Lambda functions within an AWS account.

By using layers, developers can maintain a single copy of a library or function that multiple Lambda functions can reference, which reduces duplication and helps ensure consistency across functions. If there are updates or changes to the shared code, they can be made in one central location rather than updating each individual function separately. This enhances code organization and promotes a more manageable development process, especially in larger projects or when multiple teams are involved.

While increased deployment speed, simplified management, and cost reduction are important considerations in serverless architecture, the unique functionality of layers primarily focuses on the ease of sharing and reusability of code across various Lambda functions.