/**
 * GPU Benchmark Utilities
 *
 * Provides tools for measuring rendering performance across backends.
 */
export interface BenchmarkResult {
    backend: "webgpu" | "webgl" | "unknown";
    pointCount: number;
    fps: number;
    avgFrameTime: number;
    minFrameTime: number;
    maxFrameTime: number;
    totalFrames: number;
    duration: number;
}
export interface BenchmarkOptions {
    /** Number of points to render */
    pointCount?: number;
    /** Duration of benchmark in milliseconds */
    durationMs?: number;
    /** Warm-up frames before measuring */
    warmupFrames?: number;
    /** Callback for progress updates */
    onProgress?: (progress: number) => void;
}
/**
 * Benchmark runner for GPU backends
 */
export declare class GpuBenchmark {
    private canvas;
    private results;
    constructor(canvas?: HTMLCanvasElement);
    /**
     * Generate random line data
     */
    private generateLineData;
    /**
     * Measure frame times
     */
    private measureFrameTimes;
    /**
     * Run benchmark with WebGPU backend
     */
    benchmarkWebGPU(options?: BenchmarkOptions): Promise<BenchmarkResult | null>;
    /**
     * Run benchmark with WebGL backend
     */
    benchmarkWebGL(options?: BenchmarkOptions): Promise<BenchmarkResult | null>;
    /**
     * Calculate benchmark result from frame times
     */
    private calculateResult;
    /**
     * Run comparative benchmark
     */
    runComparison(options?: BenchmarkOptions): Promise<{
        webgpu: BenchmarkResult | null;
        webgl: BenchmarkResult | null;
        winner: "webgpu" | "webgl" | "tie" | "unknown";
        speedup: number;
    }>;
    /**
     * Get all results
     */
    getResults(): BenchmarkResult[];
    /**
     * Clear results
     */
    clearResults(): void;
    /**
     * Format result as string
     */
    static formatResult(result: BenchmarkResult): string;
}