/**
 * 性能监控工具 - 用于诊断大数据集性能问题
 *
 * @author AI Frontend Engineer
 * @date 2026-02-01
 */
declare class PerformanceMonitor {
    private marks;
    private measures;
    /**
     * 开始计时
     */
    start(name: string): void;
    /**
     * 结束计时并记录
     */
    end(name: string): number;
    /**
     * 记录中间点
     */
    checkpoint(name: string): void;
    /**
     * 获取最近的性能记录
     */
    getRecentMeasures(count?: number): Array<{
        name: string;
        duration: number;
    }>;
    /**
     * 清空所有记录
     */
    clear(): void;
    /**
     * 生成性能报告
     */
    report(): void;
}
export declare const perfMonitor2: PerformanceMonitor;
export {};