/**
 * Decorator to log the execution time of a method. It uses high-resolution time in Node.js
 * and performance.now() in browsers.
 * @param handler - A custom handler function that takes the execution time and method name as parameters.
 * @returns MethodDecorator
 */
export declare function LogExecutionTime(handler?: (executionTime: number, methodName: string) => void): (originalMethod: any, context: any) => (this: any, ...args: any[]) => any;