Function calculatePerformanceMetrics

src/ChartGPU.ts:1044–1077

()

  };

  const calculatePerformanceMetrics = (): PerformanceMetrics => {
    const fps = calculateExactFPS();
    const frameTimeStats = calculateFrameTimeStats();
    
    const gpuTiming: GPUTimingStats = {
      enabled: false, // GPU timing not yet implemented for main thread
      cpuTime: lastCPUTime as Milliseconds,
      gpuTime: 0 as Milliseconds,
    };
    
    const memory: MemoryStats = {
      used: 0 as Bytes,
      peak: 0 as Bytes,
      allocated: 0 as Bytes,
    };
    
    const frameDrops: FrameDropStats = {
      totalDrops: totalDroppedFrames,
      consecutiveDrops: consecutiveDroppedFrames,
      lastDropTimestamp: lastDropTimestamp as Milliseconds,
    };
    
    const elapsedTime = performance.now() - startTime;
    
    return {
      fps,
      frameTimeStats,
      gpuTiming,
      memory,
      frameDrops,
      totalFrames,
      elapsedTime: elapsedTime as Milliseconds,
    };
  };

  const buildPayload = (match: HitTestMatch | null, event: PointerEvent): ChartGPUEventPayload => {
    if (!match) {