export interface IMetricEntry {
    start: number;
    end: number;
}
export declare type IPerformanceObserverType = "largest-contentful-paint" | "longtask" | "measure" | "navigation" | "paint" | "resource" | "first-input";
export declare type IPerformanceEntryInitiatorType = "css" | "fetch" | "img" | "other" | "script" | "xmlhttprequest";
export declare interface IPerformanceEntry {
    decodedBodySize?: number;
    duration: number;
    entryType: IPerformanceObserverType;
    initiatorType?: IPerformanceEntryInitiatorType;
    name: string;
    startTime: number;
    loadTime: number;
    renderTime: number;
}
export interface IPerformanceDataConsumption {
    beacon: number;
    css: number;
    fetch: number;
    img: number;
    other: number;
    script: number;
    total: number;
    xmlhttprequest: number;
}
export interface IPerformancePaintTiming {
    name: string;
    entryType: string;
    startTime: number;
    duration: number;
}
declare type EffectiveConnectionType = "2g" | "3g" | "4g" | "slow-2g";
export interface NetworkInformation {
    downlink?: number;
    downlinkMax?: number;
    effectiveType?: EffectiveConnectionType;
    onchange?: () => void;
    rtt?: number;
    saveData?: boolean;
    hardwareConcurrency?: number;
}
export interface IPerformanceObserver {
    observer: () => void;
    disconnect: () => void;
}
export interface SmrNavigationTiming {
    fetchTime?: number;
    workerTime?: number;
    totalTime?: number;
    downloadTime?: number;
    timeToFirstByte?: number;
    headerSize?: number;
    dnsLookupTime?: number;
    pageLoadTime?: number;
}
export interface BasePerfCountType {
    /** 页面完渲染 + 请求耗时 */
    allRenderCount?: number;
    /** DNS查询时间耗时 */
    dnsCount?: number;
    /** 获取TCP链接时间 */
    tcpDnsCount?: number;
    /** 获取请求响应耗时 */
    reqCount?: number;
    /** 获取DOM树解析耗时 */
    dParseCount?: number;
    /** 获取资源加载耗时 */
    resLoadCount?: number;
    /** 获取DOM READY耗时 */
    dclCount?: number;
    /** 获取首次渲染耗时 */
    fcpCount?: number;
    /** 获取页面完全加载耗时 */
    pldCount?: number;
    /** 获取onload时间 */
    oldCount?: number;
}
export default class Performance {
    /**
     * 是否支持 performance 判断
     */
    static supported(): boolean;
    /**
     * 是否支持 PerformanceObserver
     * Firefox 58: https://bugzilla.mozilla.org/show_bug.cgi?id=1403027
     */
    static supportedPerformanceObserver(): boolean;
    navigationTimingCached: SmrNavigationTiming;
    private perfObserver;
    private basePerfCount;
    private tcpLoadCount;
    constructor();
    /**
     * 页面性能加载获取
     * developers.google.com/web/fundamentals/performance/navigation-and-resource-timing
     */
    getNavigationTiming(afteronLoad?: boolean): SmrNavigationTiming;
    get tcpLoadCountInfo(): number;
    /**
     * 页面性能加载获取
     * 旧版本 smartlink
     */
    private calcBasePerfCount;
    /**
     * 获取 basePerfCount
     */
    get basePerfCountInfo(): BasePerfCountType;
    /**
     * 网络连接信息 https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation
     */
    get networkInformation(): NetworkInformation;
    /**
     * 当前 性能启动的持续时间  毫秒
     */
    now(): number;
    /**
     * 使用performance 标记  mark_metricName_type
     * @param metricName
     * @param type
     */
    mark(metricName: string, type: string): void;
    /**
     * 检查存在 performance start 标记  mark_metricName_type
     * @param metricName
     * @param type
     */
    checkStartMarkName(markName: string): boolean;
    /**
     * 检测 两个标记点 （过程持续时间）
     * @param metricName
     * @param metric
     * @returns
     */
    measure(metricName: string): number;
    /**
     * PerformanceObserver subscribes to performance events as they happen
     * and respond to them asynchronously.
     */
    performanceObserver(eventType: IPerformanceObserverType, cb: (entries: any[]) => void): IPerformanceObserver;
    private performanceObserverCb;
    getStartMarkName(name: string): string;
    getEndMarkName(name: string): string;
}
export {};