import { VNode } from "./common";
/**
 * Track time performance of a function.
 * Call trackPerformances() to start time tracking.
 * Then call the returned function to stop time tracking and output delta in console.
 * @param subject Name of tracked function.
 */
export declare function trackPerformances(subject: string): () => void;
/**
 * Memory usage Reflex Component.
 * TODO : Should not trigger drawReflexDebug
 */
export declare function MemoryUsage(props: any): () => VNode;
export declare function drawReflexDebug(): () => void;