import type { NextFunction, Request, Response } from 'express-serve-static-core';
interface ResponseProfile {
    startTime: number;
}
interface ResponseMetadata extends Record<string, unknown> {
    profile?: ResponseProfile;
}
interface ResponseLocals {
    meta?: ResponseMetadata;
}
/**
 * Connect middleware to enable profiling of response lifecycle timing. To effectively profile
 * the response timing, this middleware needs to be called first when initializing your Express
 * App
 * @example
 * const app = express()
 * app.use(responseProfiler)
 * // other initialization ...
 * @param _req The request
 * @param res The response
 * @param next The next function
 */
export declare const responseProfiler: (_req: Request, res: Response<unknown, ResponseLocals>, next: NextFunction) => void;
export {};
//# sourceMappingURL=responseProfiler.d.ts.map