/**
 * Performance Testing Helper for Load and Timing Tests - TypeScript Implementation
 *
 * This class focuses solely on performance measurement and testing concerns.
 * It provides standardized performance measurement across test suites.
 */
interface TimingMeasurement {
    result: any;
    duration: number;
    durationNs: number;
    timestamp: Date;
}
interface ConcurrencyResult {
    index: number;
    result?: any;
    error?: string;
    duration: number;
    success: boolean;
}
interface ConcurrencyTestResult {
    results: ConcurrencyResult[];
    totalDuration: number;
    successCount: number;
    errorCount: number;
    averageDuration: number;
    maxDuration: number;
    minDuration: number;
}
/**
 * Performance Testing Helper for Load and Timing Tests
 *
 * This class provides standardized performance measurement across test suites
 * with timing assertions and concurrency testing capabilities.
 */
declare class PerformanceTestHelper {
    /**
     * Measures execution time of async operations with high precision
     */
    static measureTime(operation: () => Promise<any>): Promise<TimingMeasurement>;
    /**
     * Asserts operation completes within time limit
     */
    static assertTimingConstraint(operation: () => Promise<any>, maxDuration: number): Promise<any>;
    /**
     * Tests concurrent operations for race conditions and performance
     */
    static testConcurrency(operations: Array<() => Promise<any>>): Promise<ConcurrencyTestResult>;
    /**
     * Measures memory usage during operation execution
     */
    static measureMemory(operation: () => Promise<any>): Promise<{
        result: any;
        memoryUsage: NodeJS.MemoryUsage;
    }>;
    /**
     * Runs load testing with specified concurrent users
     */
    static loadTest(operation: () => Promise<any>, concurrentUsers: number, iterations: number): Promise<any>;
    /**
     * Creates a performance benchmark suite
     */
    static createBenchmarkSuite(operations: Record<string, () => Promise<any>>): any;
}
export { PerformanceTestHelper };
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