Performance Profiling

/**
 * User interaction tracking data
 */
interface Interaction {
  /** Unique interaction identifier */
  id: number;
  /** Human-readable interaction name */
  name: string;
  /** Timestamp when interaction started */
  timestamp: number;
}

/**
 * Interaction with associated commit information
 */
interface InteractionWithCommits {
  /** Unique interaction identifier */
  id: number;
  /** Human-readable interaction name */
  name: string;
  /** Timestamp when interaction started */
  timestamp: number;
  /** Array of commit indices associated with this interaction */
  commits: Array<number>;
}

/**
 * Collection of interactions for a root
 */
interface Interactions {
  /** Array of interactions with their commits */
  interactions: Array<InteractionWithCommits>;
  /** Root ID these interactions belong to */
  rootID: number;
}

// Access interaction data
const interactions = getInteractionsForRoot(rootID);
interactions.interactions.forEach(interaction => {
  console.log(`Interaction: ${interaction.name}`);
  console.log(`Started at: ${new Date(interaction.timestamp)}`);
  console.log(`Commits: ${interaction.commits.length}`);
});

/**
 * Detailed performance data for a specific commit
 */
interface CommitDetails {
  /** Array of actual render durations for each element */
  actualDurations: Array<number>;
  /** Index of this commit in the profiling session */
  commitIndex: number;
  /** Interactions that triggered this commit */
  interactions: Array<Interaction>;
  /** Root ID this commit belongs to */
  rootID: number;
}

/**
 * Aggregated profiling statistics for a root
 */
interface ProfilingSummary {
  /** Duration of each commit in milliseconds */
  commitDurations: Array<number>;
  /** Timestamp of each commit */
  commitTimes: Array<number>;
  /** Initial tree base durations before profiling started */
  initialTreeBaseDurations: Array<number>;
  /** Total number of interactions recorded */
  interactionCount: number;
  /** Root ID this summary belongs to */
  rootID: number;
}

// Analyze commit performance
const commitDetails = getCommitDetails(rootID, commitIndex);
console.log(`Commit ${commitIndex}:`);
console.log(`Interactions: ${commitDetails.interactions.length}`);

// Calculate average render time
const avgDuration = commitDetails.actualDurations.reduce((a, b) => a + b, 0) / 
                   commitDetails.actualDurations.length;
console.log(`Average render duration: ${avgDuration}ms`);

// Get profiling summary
const summary = getProfilingSummary(rootID);
console.log(`Total commits: ${summary.commitDurations.length}`);
console.log(`Total interactions: ${summary.interactionCount}`);

// Find slowest commit
const slowestIndex = summary.commitDurations.indexOf(
  Math.max(...summary.commitDurations)
);
console.log(`Slowest commit: ${slowestIndex} (${summary.commitDurations[slowestIndex]}ms)`);

/**
 * Component node in profiler tree
 */
interface Node {
  /** Unique element identifier */
  id: number;
  /** Array of child element IDs */
  children: Array<number>;
  /** Component display name */
  displayName: string | null;
  /** React key prop */
  key: number | string | null;
  /** Parent element ID */
  parentID: number;
  /** Base duration for this subtree */
  treeBaseDuration: number;
}

/**
 * Complete commit tree structure
 */
interface CommitTree {
  /** Map of element ID to node data */
  nodes: Map<number, Node>;
  /** Root element ID for this tree */
  rootID: number;
}

// Build commit tree visualization
const commitTree = buildCommitTree(commitData);
const rootNode = commitTree.nodes.get(commitTree.rootID);

function renderNode(node, depth = 0) {
  const indent = '  '.repeat(depth);
  console.log(`${indent}${node.displayName} (${node.treeBaseDuration}ms)`);
  
  node.children.forEach(childID => {
    const childNode = commitTree.nodes.get(childID);
    if (childNode) {
      renderNode(childNode, depth + 1);
    }
  });
}

renderNode(rootNode);

/**
 * Suspense-compatible cache for profiling data
 * Enables efficient async loading of large profiling datasets
 */
class ProfilingCache {
  /**
   * Read profiling data for specific parameters
   * Suspends if data is not yet available
   * @param params - Parameters identifying the data to read
   * @returns Profiling data when available
   */
  read(params: ProfilingParams): ProfilingData;
  
  /**
   * Preload profiling data to warm cache
   * @param params - Parameters identifying the data to preload
   */
  preload(params: ProfilingParams): void;
  
  /**
   * Clear all cached profiling data
   */
  invalidate(): void;
}

interface ProfilingParams {
  rootID: number;
  commitIndex?: number;
  interactionID?: number;
}

import { Suspense } from 'react';

function ProfilingResults({ rootID }) {
  return (
    <Suspense fallback={<LoadingSpinner />}>
      <CommitList rootID={rootID} />
    </Suspense>
  );
}

function CommitList({ rootID }) {
  const store = useContext(StoreContext);
  
  // This will suspend if profiling data is not ready
  const profilingSummary = store.profilingCache.read({ rootID });
  
  return (
    <div>
      {profilingSummary.commitDurations.map((duration, index) => (
        <CommitItem 
          key={index}
          rootID={rootID}
          commitIndex={index}
          duration={duration}
        />
      ))}
    </div>
  );
}

/**
 * Create a resource for Suspense-based data loading
 * @param fetchFn - Function to fetch the data
 * @param keyFn - Optional function to generate cache keys
 * @returns Resource that can be read with Suspense
 */
function createResource<Input, Value>(
  fetchFn: (input: Input) => Promise<Value>,
  keyFn?: (input: Input) => string
): Resource<Input, Value>;

interface Resource<Input, Value> {
  read(input: Input): Value;
  preload(input: Input): void;
}

// Create resource for commit details
const commitDetailsResource = createResource(
  async ({ rootID, commitIndex }) => {
    const response = await bridge.send('get-commit-details', { rootID, commitIndex });
    return response.data;
  },
  ({ rootID, commitIndex }) => `commit-${rootID}-${commitIndex}`
);

// Use in component
function CommitDetails({ rootID, commitIndex }) {
  // Suspends until data is available
  const details = commitDetailsResource.read({ rootID, commitIndex });
  
  return (
    <div>
      <h3>Commit {commitIndex}</h3>
      <p>Duration: {calculateCommitDuration(details)}ms</p>
      <InteractionsList interactions={details.interactions} />
    </div>
  );
}

/**
 * Start profiling session with optional configuration
 * @param options - Profiling configuration options
 */
function startProfiling(options?: ProfilingOptions): void;

interface ProfilingOptions {
  /** Include component stack traces */
  includeStackTraces?: boolean;
  /** Track interaction origins */
  trackInteractions?: boolean;
  /** Maximum profiling duration in milliseconds */
  maxDuration?: number;
}

// Start basic profiling
store.startProfiling();

// Start profiling with options
store.startProfiling({
  includeStackTraces: true,
  trackInteractions: true,
  maxDuration: 30000 // 30 seconds max
});

// Listen for profiling start
store.on('profiling-started', () => {
  showProfilingIndicator();
  
  // Auto-stop after timeout
  setTimeout(() => {
    if (store.isProfiling) {
      store.stopProfiling();
    }
  }, 30000);
});

/**
 * Stop current profiling session
 * Triggers data processing and makes results available
 */
function stopProfiling(): void;

/**
 * Check if profiling data is available for analysis
 * @returns Whether profiling data has been collected
 */
function hasProfilingData(): boolean;

// Stop profiling and analyze results
store.stopProfiling();

store.on('profiling-stopped', () => {
  if (store.hasProfilingData) {
    analyzeProfilingResults();
  }
});

function analyzeProfilingResults() {
  store.roots.forEach(rootID => {
    const summary = getProfilingSummary(rootID);
    
    console.log(`Root ${rootID} performance:`);
    console.log(`  Total commits: ${summary.commitDurations.length}`);
    console.log(`  Average commit time: ${average(summary.commitDurations)}ms`);
    console.log(`  Slowest commit: ${Math.max(...summary.commitDurations)}ms`);
    console.log(`  Interactions: ${summary.interactionCount}`);
  });
}

/**
 * Trace interaction performance impact
 * @param interactionName - Human-readable interaction name
 * @param callback - Function to execute during interaction
 * @returns Promise resolving when interaction completes
 */
function traceInteraction<T>(
  interactionName: string,
  callback: () => T
): Promise<T>;

// Trace button click interaction
await traceInteraction('Button Click', () => {
  handleButtonClick();
});

// Trace navigation interaction
await traceInteraction('Navigate to Dashboard', () => {
  navigate('/dashboard');
});

// Custom interaction tracking
function trackUserAction(actionName, actionFn) {
  return traceInteraction(actionName, () => {
    const startTime = performance.now();
    const result = actionFn();
    const endTime = performance.now();
    
    console.log(`${actionName} took ${endTime - startTime}ms`);
    return result;
  });
}

/**
 * Generate flame graph data for commit visualization
 * @param commitIndex - Commit to generate flame graph for
 * @param rootID - Root ID for the commit
 * @returns Flame graph node data
 */
function generateFlameGraphData(
  commitIndex: number,
  rootID: number
): FlameGraphNode[];

interface FlameGraphNode {
  id: number;
  name: string;
  value: number;
  children: FlameGraphNode[];
  depth: number;
  offset: number;
}

// Generate flame graph for visualization
const flameGraphData = generateFlameGraphData(commitIndex, rootID);

function renderFlameGraph(nodes, parentWidth = 100) {
  return nodes.map(node => (
    <div
      key={node.id}
      style={{
        width: `${(node.value / parentWidth) * 100}%`,
        backgroundColor: getColorForDuration(node.value),
        height: '20px',
        position: 'relative'
      }}
      title={`${node.name}: ${node.value}ms`}
    >
      {node.children.length > 0 && (
        <div style={{ position: 'absolute', top: '20px', left: 0, right: 0 }}>
          {renderFlameGraph(node.children, node.value)}
        </div>
      )}
    </div>
  ));
}

/**
 * Calculate performance metrics for profiling session
 * @param rootID - Root to calculate metrics for
 * @returns Performance metrics object
 */
function calculateMetrics(rootID: number): PerformanceMetrics;

interface PerformanceMetrics {
  totalTime: number;
  averageCommitTime: number;
  medianCommitTime: number;
  slowestCommitTime: number;
  fastestCommitTime: number;
  commitCount: number;
  interactionCount: number;
  componentsAffected: number;
}

// Calculate and display performance metrics
const metrics = calculateMetrics(rootID);

console.log('Performance Summary:');
console.log(`Total Time: ${metrics.totalTime}ms`);
console.log(`Average Commit: ${metrics.averageCommitTime}ms`);
console.log(`Median Commit: ${metrics.medianCommitTime}ms`);
console.log(`Range: ${metrics.fastestCommitTime}ms - ${metrics.slowestCommitTime}ms`);
console.log(`Commits: ${metrics.commitCount}`);
console.log(`Interactions: ${metrics.interactionCount}`);
console.log(`Components Affected: ${metrics.componentsAffected}`);

// Performance score calculation
function calculatePerformanceScore(metrics) {
  const avgTime = metrics.averageCommitTime;
  
  if (avgTime < 16) return 'Excellent'; // 60fps
  if (avgTime < 33) return 'Good';      // 30fps
  if (avgTime < 100) return 'Fair';     // 10fps
  return 'Poor';
}

console.log(`Performance Score: ${calculatePerformanceScore(metrics)}`);