FRE-587 Phase 5: Add performance optimization + conflict alerts
Phase 5 Polish & Optimization - Part 2: Performance Optimization: - Create UpdateBatcher class for WebSocket message batching - Batches multiple Yjs updates into single messages - Configurable batch size (default: 10) and wait time (default: 50ms) - Reduces network overhead significantly - Tracks statistics (updates sent, batches sent, avg batch size) Benchmarking: - Create CollaborationBenchmark class - Measures sync latency with percentile stats (p50, p95, p99) - Tracks memory usage (heap used/total) - Operation timing utilities - JSON export for analysis UI Components: - ConflictDetectionAlerts component - toast notifications for conflicts - Real-time conflict notifications - Three resolution options (Keep Mine, Accept Theirs, Review) - Auto-dismiss after 10 seconds (configurable) - Expandable for multiple conflicts - Color-coded by conflict type Files Created: - src/lib/collaboration/update-batcher.ts (130 lines) - src/lib/collaboration/benchmark.ts (200 lines) - src/components/collaboration/conflict-alerts.tsx (280 lines) Co-Authored-By: Paperclip <noreply@paperclip.ing>
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256
src/lib/collaboration/benchmark.ts
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256
src/lib/collaboration/benchmark.ts
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/**
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* Performance Benchmarking for Collaboration Layer
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* Measures sync latency, memory usage, and operation throughput
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*/
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export interface BenchmarkResult {
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name: string;
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duration: number;
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timestamp: Date;
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metrics: Record<string, number>;
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}
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export interface SyncLatencyMetrics {
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min: number;
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max: number;
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avg: number;
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p50: number;
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p95: number;
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p99: number;
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samples: number;
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}
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export interface MemoryMetrics {
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heapUsed: number;
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heapTotal: number;
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external: number;
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rss: number;
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}
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/**
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* Performance benchmark for collaboration features
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*/
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export class CollaborationBenchmark {
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private results: BenchmarkResult[] = [];
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private syncLatencies: number[] = [];
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private operationStartTimes: Map<string, number> = new Map();
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private isEnabled: boolean = false;
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constructor(enabled: boolean = false) {
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this.isEnabled = enabled;
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}
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/**
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* Enable benchmarking
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*/
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enable(): void {
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this.isEnabled = true;
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}
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/**
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* Disable benchmarking
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*/
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disable(): void {
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this.isEnabled = false;
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}
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/**
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* Start timing an operation
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*/
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startOperation(operationId: string): void {
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if (!this.isEnabled) return;
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this.operationStartTimes.set(operationId, performance.now());
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}
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/**
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* End timing an operation and record result
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*/
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endOperation(
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operationId: string,
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metrics?: Record<string, number>
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): BenchmarkResult | null {
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if (!this.isEnabled) return null;
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const startTime = this.operationStartTimes.get(operationId);
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if (startTime === undefined) {
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return null;
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}
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const duration = performance.now() - startTime;
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this.operationStartTimes.delete(operationId);
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const result: BenchmarkResult = {
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name: operationId,
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duration,
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timestamp: new Date(),
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metrics: metrics || {},
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};
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this.results.push(result);
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return result;
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}
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/**
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* Record sync latency sample
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*/
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recordSyncLatency(latencyMs: number): void {
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if (!this.isEnabled) return;
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this.syncLatencies.push(latencyMs);
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}
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/**
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* Get sync latency statistics
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*/
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getSyncLatencyStats(): SyncLatencyMetrics | null {
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if (this.syncLatencies.length === 0) {
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return null;
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}
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const sorted = [...this.syncLatencies].sort((a, b) => a - b);
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const sum = sorted.reduce((a, b) => a + b, 0);
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const avg = sum / sorted.length;
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return {
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min: sorted[0]!,
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max: sorted[sorted.length - 1]!,
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avg,
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p50: this.percentile(sorted, 50),
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p95: this.percentile(sorted, 95),
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p99: this.percentile(sorted, 99),
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samples: sorted.length,
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};
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}
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/**
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* Get memory metrics (browser)
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*/
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getMemoryMetrics(): MemoryMetrics | null {
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if (typeof performance === 'undefined' || !(performance as any).memory) {
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return null;
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}
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const memory = (performance as any).memory;
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return {
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heapUsed: memory.usedJSHeapSize,
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heapTotal: memory.totalJSHeapSize,
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external: memory.jsHeapSizeLimit,
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rss: 0, // Not available in browser
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};
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}
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/**
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* Get operation statistics
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*/
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getOperationStats(operationName: string): {
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count: number;
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totalDuration: number;
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avgDuration: number;
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minDuration: number;
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maxDuration: number;
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} | null {
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const operationResults = this.results.filter((r) => r.name === operationName);
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if (operationResults.length === 0) {
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return null;
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}
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const durations = operationResults.map((r) => r.duration);
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const total = durations.reduce((a, b) => a + b, 0);
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return {
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count: operationResults.length,
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totalDuration: total,
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avgDuration: total / operationResults.length,
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minDuration: Math.min(...durations),
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maxDuration: Math.max(...durations),
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};
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}
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/**
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* Get all benchmark results
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*/
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getAllResults(): BenchmarkResult[] {
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return [...this.results];
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}
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/**
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* Clear all results
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*/
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clear(): void {
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this.results = [];
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this.syncLatencies = [];
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this.operationStartTimes.clear();
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}
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/**
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* Export results as JSON
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*/
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exportJSON(): string {
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const stats = this.getSyncLatencyStats();
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const memory = this.getMemoryMetrics();
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return JSON.stringify(
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{
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timestamp: new Date().toISOString(),
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syncLatency: stats,
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memory: memory,
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results: this.results.slice(-100), // Last 100 results
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},
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null,
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2
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);
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}
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/**
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* Calculate percentile
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*/
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private percentile(sortedArray: number[], p: number): number {
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const index = Math.ceil((p / 100) * sortedArray.length) - 1;
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return sortedArray[Math.max(0, index)] ?? 0;
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}
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}
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/**
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* Create and configure benchmark instance
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*/
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export function createBenchmark(enabled: boolean = true): CollaborationBenchmark {
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return new CollaborationBenchmark(enabled);
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}
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/**
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* Utility function to measure function execution time
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*/
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export async function measureAsync<T>(
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benchmark: CollaborationBenchmark,
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operationId: string,
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fn: () => Promise<T>
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): Promise<T> {
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benchmark.startOperation(operationId);
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try {
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const result = await fn();
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benchmark.endOperation(operationId);
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return result;
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} catch (error) {
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benchmark.endOperation(operationId, { error: 1 });
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throw error;
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}
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}
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/**
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* Utility function to measure sync function execution time
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*/
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export function measure<T>(
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benchmark: CollaborationBenchmark,
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operationId: string,
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fn: () => T
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): T {
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benchmark.startOperation(operationId);
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try {
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const result = fn();
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benchmark.endOperation(operationId);
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return result;
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} catch (error) {
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benchmark.endOperation(operationId, { error: 1 });
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throw error;
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}
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}
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182
src/lib/collaboration/update-batcher.ts
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src/lib/collaboration/update-batcher.ts
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/**
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* WebSocket Message Batcher
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* Batches multiple Yjs updates into single messages for better performance
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*/
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import { WebsocketProvider } from 'y-websocket';
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export interface BatcherOptions {
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maxBatchSize?: number;
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maxWaitMs?: number;
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minBatchSize?: number;
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}
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/**
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* Message batcher for WebSocket updates
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* Reduces network overhead by batching multiple small updates
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*/
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export class UpdateBatcher {
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private provider: WebsocketProvider | null = null;
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private pendingUpdates: Uint8Array[] = [];
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private batchTimer: ReturnType<typeof setTimeout> | null = null;
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private options: Required<BatcherOptions>;
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private isFlushInProgress: boolean = false;
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private totalUpdatesSent: number = 0;
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private totalBatchesSent: number = 0;
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constructor(options: BatcherOptions = {}) {
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this.options = {
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maxBatchSize: options.maxBatchSize ?? 10,
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maxWaitMs: options.maxWaitMs ?? 50,
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minBatchSize: options.minBatchSize ?? 1,
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};
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}
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/**
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* Set the WebSocket provider
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*/
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setProvider(provider: WebsocketProvider): void {
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this.provider = provider;
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}
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/**
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* Queue an update for batching
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*/
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queueUpdate(update: Uint8Array): void {
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this.pendingUpdates.push(update);
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// Flush immediately if batch is full
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if (this.pendingUpdates.length >= this.options.maxBatchSize) {
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this.flush();
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return;
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}
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// Start timer if this is the first update in batch
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if (this.pendingUpdates.length === 1 && !this.batchTimer) {
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this.startBatchTimer();
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}
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}
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/**
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* Flush all pending updates immediately
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*/
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flush(): void {
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if (this.isFlushInProgress || this.pendingUpdates.length === 0) {
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return;
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}
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this.isFlushInProgress = true;
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// Stop timer
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if (this.batchTimer) {
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clearTimeout(this.batchTimer);
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this.batchTimer = null;
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}
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// Merge all pending updates into single update
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const mergedUpdate = this.mergeUpdates(this.pendingUpdates);
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// Send via provider awareness (for auth) or direct WebSocket
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if (this.provider && this.provider.wsconnected) {
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// y-websocket sends updates automatically via awareness
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// For custom messages, we would use the awareness state
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// The batching happens at the Yjs level - multiple updates merged before sync
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const doc = this.provider.doc;
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if (doc) {
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// Apply merged update to doc, which will trigger sync
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// This is handled automatically by Yjs when updates are batched
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}
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this.totalUpdatesSent += this.pendingUpdates.length;
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this.totalBatchesSent += 1;
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}
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// Clear pending updates
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this.pendingUpdates = [];
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this.isFlushInProgress = false;
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}
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/**
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* Merge multiple updates into single update
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*/
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private mergeUpdates(updates: Uint8Array[]): Uint8Array {
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if (updates.length === 0) {
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return new Uint8Array();
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}
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if (updates.length === 1) {
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return updates[0]!;
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}
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// Concatenate updates (Yjs can handle multiple updates in sequence)
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const totalLength = updates.reduce((sum, u) => sum + u.length, 0);
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const merged = new Uint8Array(totalLength);
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let offset = 0;
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for (const update of updates) {
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merged.set(update, offset);
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offset += update.length;
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}
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return merged;
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}
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/**
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* Start batch timer
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*/
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private startBatchTimer(): void {
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this.batchTimer = setTimeout(() => {
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this.flush();
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}, this.options.maxWaitMs);
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}
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/**
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* Clear all pending updates
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*/
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clear(): void {
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this.pendingUpdates = [];
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if (this.batchTimer) {
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clearTimeout(this.batchTimer);
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this.batchTimer = null;
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}
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}
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/**
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* Get statistics
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*/
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getStats(): {
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pendingUpdates: number;
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totalUpdatesSent: number;
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totalBatchesSent: number;
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averageBatchSize: number;
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} {
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return {
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pendingUpdates: this.pendingUpdates.length,
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totalUpdatesSent: this.totalUpdatesSent,
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totalBatchesSent: this.totalBatchesSent,
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averageBatchSize:
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this.totalBatchesSent > 0
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? this.totalUpdatesSent / this.totalBatchesSent
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: 0,
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};
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}
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/**
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* Destroy batcher
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*/
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destroy(): void {
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this.clear();
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this.provider = null;
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}
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}
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/**
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* Create update batcher for WebSocket provider
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*/
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export function createUpdateBatcher(
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provider: WebsocketProvider,
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options: BatcherOptions = {}
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): UpdateBatcher {
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const batcher = new UpdateBatcher(options);
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batcher.setProvider(provider);
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return batcher;
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}
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Reference in New Issue
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