A Digital Developer is asked to optimize controller performance by lazy loading scripts as needed...

To optimize controller performance by lazy loading scripts as needed, the best approach in a Salesforce Commerce Cloud environment is to use the require() method. This method allows scripts to be loaded dynamically at the time they are needed rather than at the start of the code execution, which can significantly improve performance by reducing the initial load time and resource consumption. The require() method is part of the CommonJS module specification implemented in the Rhino JavaScript engine used by Salesforce B2C Commerce. This method provides a standard way to include modular JavaScript files as needed during runtime, as detailed in the "Managing Scripts with require()" section of the Salesforce Commerce Cloud documentation.