Improve site performance for Arabic-speaking users with faster loading

Implements lazy loading for components and optimizes Arabic font rendering using ArabicFontOptimizer and ArabicPerformanceTracker.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: c5f0c281-8dd8-4846-b452-4a07bcd21062
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/9777c70b-fc38-4831-8d6b-78dfffe041b0/65a93bfa-c7e5-4f55-823d-9f81089502c3.jpg

client/src/components/LazyComponents.tsx

@@ -0,0 +1,43 @@
+import { lazy, Suspense } from 'react';
+import { Skeleton } from '@/components/ui/skeleton';
+
+// Lazy load large components to improve bundle performance
+export const LazyBudgetPlanner = lazy(() => import('@/components/financial/BudgetPlanner'));
+export const LazyProjectManager = lazy(() => import('@/components/tasks/ProjectManager'));
+export const LazyAIChat = lazy(() => import('@/components/ai/AIChat'));
+export const LazyConversationHistory = lazy(() => import('@/components/ai/ConversationHistory'));
+export const LazySystemMonitoring = lazy(() => import('@/pages/SystemMonitoringPage'));
+export const LazyPerformanceBenchmark = lazy(() => import('@/components/PerformanceBenchmark'));
+
+// Reusable loading fallback for Arabic RTL support
+const LoadingSkeleton = ({ className = "" }: { className?: string }) => (
+  <div className={`space-y-4 ${className}`}>
+    <Skeleton className="h-8 w-3/4" />
+    <Skeleton className="h-4 w-1/2" />
+    <Skeleton className="h-32 w-full" />
+    <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
+      <Skeleton className="h-24 w-full" />
+      <Skeleton className="h-24 w-full" />
+    </div>
+  </div>
+);
+
+// Higher-order component for lazy loading with Arabic RTL loading states
+export const withLazyLoading = <P extends object>(
+  Component: React.ComponentType<P>,
+  loadingClassName?: string
+) => {
+  return (props: P) => (
+    <Suspense fallback={<LoadingSkeleton className={loadingClassName} />}>
+      <Component {...props} />
+    </Suspense>
+  );
+};
+
+// Pre-configured lazy components with loading states
+export const BudgetPlannerWithLoading = withLazyLoading(LazyBudgetPlanner, "p-6");
+export const ProjectManagerWithLoading = withLazyLoading(LazyProjectManager, "p-4");
+export const AIChatWithLoading = withLazyLoading(LazyAIChat, "h-96");
+export const ConversationHistoryWithLoading = withLazyLoading(LazyConversationHistory);
+export const SystemMonitoringWithLoading = withLazyLoading(LazySystemMonitoring);
+export const PerformanceBenchmarkWithLoading = withLazyLoading(LazyPerformanceBenchmark, "p-6");

client/src/components/RTLProvider.tsx

@@ -1,5 +1,7 @@
 import { createContext, useContext, useEffect } from 'react';
 import { useTranslation } from 'react-i18next';
+import { arabicFontOptimizer } from '@/lib/fontOptimization';
+import { arabicPerformanceTracker } from '@/lib/arabicPerformanceTracker';
 
 interface RTLContextType {
   isRTL: boolean;

client/src/lib/arabicPerformanceTracker.ts

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+interface ArabicPerformanceMetrics {
+  rtlRenderTime: number;
+  fontLoadTime: number;
+  layoutShiftScore: number;
+  textDirectionSwitchTime: number;
+  arabicTextRenderScore: number;
+  timestamp: number;
+}
+
+interface PerformanceThresholds {
+  rtlRenderTime: number;
+  fontLoadTime: number;
+  layoutShiftScore: number;
+  textDirectionSwitchTime: number;
+}
+
+export class ArabicPerformanceTracker {
+  private metrics: ArabicPerformanceMetrics[] = [];
+  private thresholds: PerformanceThresholds = {
+    rtlRenderTime: 50, // ms
+    fontLoadTime: 200, // ms
+    layoutShiftScore: 0.1,
+    textDirectionSwitchTime: 100 // ms
+  };
+
+  trackRTLPerformance(language: string): ArabicPerformanceMetrics {
+    const startTime = performance.now();
+    
+    // Measure RTL layout rendering
+    const rtlContainer = document.createElement('div');
+    rtlContainer.style.direction = language === 'ar' ? 'rtl' : 'ltr';
+    rtlContainer.style.position = 'absolute';
+    rtlContainer.style.visibility = 'hidden';
+    rtlContainer.innerHTML = language === 'ar' 
+      ? 'مرحباً بكم في منصة المساعد الذكي للمهنيين العمانيين' 
+      : 'Welcome to MenAssist Professional Platform';
+    
+    document.body.appendChild(rtlContainer);
+    const rtlRenderTime = performance.now() - startTime;
+    
+    // Measure font loading for Arabic
+    const fontStartTime = performance.now();
+    const fontTestElement = document.createElement('span');
+    fontTestElement.style.fontFamily = language === 'ar' ? 'Noto Sans Arabic' : 'Inter';
+    fontTestElement.style.fontSize = '16px';
+    fontTestElement.innerHTML = language === 'ar' ? 'اختبار الخط' : 'Font Test';
+    rtlContainer.appendChild(fontTestElement);
+    
+    const fontLoadTime = performance.now() - fontStartTime;
+    
+    // Measure layout shift
+    const initialWidth = rtlContainer.offsetWidth;
+    const layoutShiftScore = this.measureLayoutShift(rtlContainer, initialWidth);
+    
+    // Measure direction switch performance
+    const directionSwitchTime = this.measureDirectionSwitch(rtlContainer, language);
+    
+    document.body.removeChild(rtlContainer);
+    
+    const metrics: ArabicPerformanceMetrics = {
+      rtlRenderTime,
+      fontLoadTime,
+      layoutShiftScore,
+      textDirectionSwitchTime: directionSwitchTime,
+      arabicTextRenderScore: this.calculateTextRenderScore(rtlRenderTime, fontLoadTime),
+      timestamp: Date.now()
+    };
+    
+    this.metrics.push(metrics);
+    this.analyzePerformanceIssues(metrics);
+    
+    return metrics;
+  }
+
+  private measureLayoutShift(element: HTMLElement, initialWidth: number): number {
+    // Simulate font loading completion
+    element.style.fontDisplay = 'swap';
+    const finalWidth = element.offsetWidth;
+    return Math.abs(finalWidth - initialWidth) / initialWidth;
+  }
+
+  private measureDirectionSwitch(element: HTMLElement, currentLanguage: string): number {
+    const startTime = performance.now();
+    
+    // Switch direction
+    element.style.direction = currentLanguage === 'ar' ? 'ltr' : 'rtl';
+    element.style.textAlign = currentLanguage === 'ar' ? 'left' : 'right';
+    
+    // Force reflow
+    element.offsetHeight;
+    
+    return performance.now() - startTime;
+  }
+
+  private calculateTextRenderScore(rtlTime: number, fontTime: number): number {
+    const totalTime = rtlTime + fontTime;
+    if (totalTime < 50) return 100;
+    if (totalTime < 100) return 90;
+    if (totalTime < 200) return 80;
+    if (totalTime < 300) return 70;
+    return 60;
+  }
+
+  private analyzePerformanceIssues(metrics: ArabicPerformanceMetrics): void {
+    const issues: string[] = [];
+    
+    if (metrics.rtlRenderTime > this.thresholds.rtlRenderTime) {
+      issues.push('RTL rendering slower than optimal');
+    }
+    
+    if (metrics.fontLoadTime > this.thresholds.fontLoadTime) {
+      issues.push('Arabic font loading slower than optimal');
+    }
+    
+    if (metrics.layoutShiftScore > this.thresholds.layoutShiftScore) {
+      issues.push('Significant layout shift during font loading');
+    }
+    
+    if (metrics.textDirectionSwitchTime > this.thresholds.textDirectionSwitchTime) {
+      issues.push('Direction switching performance issue');
+    }
+    
+    if (issues.length > 0) {
+      console.warn('Arabic Performance Issues Detected:', issues);
+      this.sendPerformanceAlert(metrics, issues);
+    }
+  }
+
+  private sendPerformanceAlert(metrics: ArabicPerformanceMetrics, issues: string[]): void {
+    // Send performance data to analytics endpoint
+    fetch('/api/analytics/arabic-performance', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        metrics,
+        issues,
+        userAgent: navigator.userAgent,
+        timestamp: Date.now()
+      })
+    }).catch(error => {
+      console.warn('Failed to send Arabic performance data:', error);
+    });
+  }
+
+  getAverageMetrics(): Partial<ArabicPerformanceMetrics> {
+    if (this.metrics.length === 0) return {};
+    
+    const totals = this.metrics.reduce((acc, metric) => ({
+      rtlRenderTime: acc.rtlRenderTime + metric.rtlRenderTime,
+      fontLoadTime: acc.fontLoadTime + metric.fontLoadTime,
+      layoutShiftScore: acc.layoutShiftScore + metric.layoutShiftScore,
+      textDirectionSwitchTime: acc.textDirectionSwitchTime + metric.textDirectionSwitchTime,
+      arabicTextRenderScore: acc.arabicTextRenderScore + metric.arabicTextRenderScore
+    }), {
+      rtlRenderTime: 0,
+      fontLoadTime: 0,
+      layoutShiftScore: 0,
+      textDirectionSwitchTime: 0,
+      arabicTextRenderScore: 0
+    });
+    
+    const count = this.metrics.length;
+    return {
+      rtlRenderTime: totals.rtlRenderTime / count,
+      fontLoadTime: totals.fontLoadTime / count,
+      layoutShiftScore: totals.layoutShiftScore / count,
+      textDirectionSwitchTime: totals.textDirectionSwitchTime / count,
+      arabicTextRenderScore: totals.arabicTextRenderScore / count
+    };
+  }
+
+  getPerformanceReport(): {
+    averageMetrics: Partial<ArabicPerformanceMetrics>;
+    totalSamples: number;
+    performanceGrade: string;
+    recommendations: string[];
+  } {
+    const averageMetrics = this.getAverageMetrics();
+    const totalSamples = this.metrics.length;
+    
+    const performanceGrade = this.calculatePerformanceGrade(averageMetrics);
+    const recommendations = this.generateRecommendations(averageMetrics);
+    
+    return {
+      averageMetrics,
+      totalSamples,
+      performanceGrade,
+      recommendations
+    };
+  }
+
+  private calculatePerformanceGrade(metrics: Partial<ArabicPerformanceMetrics>): string {
+    const score = metrics.arabicTextRenderScore || 0;
+    if (score >= 90) return 'A+';
+    if (score >= 80) return 'A';
+    if (score >= 70) return 'B+';
+    if (score >= 60) return 'B';
+    return 'C';
+  }
+
+  private generateRecommendations(metrics: Partial<ArabicPerformanceMetrics>): string[] {
+    const recommendations: string[] = [];
+    
+    if ((metrics.rtlRenderTime || 0) > this.thresholds.rtlRenderTime) {
+      recommendations.push('Optimize CSS for RTL layouts using logical properties');
+      recommendations.push('Implement CSS containment for Arabic text sections');
+    }
+    
+    if ((metrics.fontLoadTime || 0) > this.thresholds.fontLoadTime) {
+      recommendations.push('Preload Arabic fonts with font-display: swap');
+      recommendations.push('Use font subsetting for Arabic character ranges');
+    }
+    
+    if ((metrics.layoutShiftScore || 0) > this.thresholds.layoutShiftScore) {
+      recommendations.push('Reserve space for Arabic text during font loading');
+      recommendations.push('Use size-adjust property for Arabic font fallbacks');
+    }
+    
+    return recommendations;
+  }
+
+  clearMetrics(): void {
+    this.metrics = [];
+  }
+}
+
+export const arabicPerformanceTracker = new ArabicPerformanceTracker();

client/src/lib/fontOptimization.ts

@@ -0,0 +1,121 @@
+// Arabic font optimization with CDN delivery
+export class ArabicFontOptimizer {
+  private fontCache = new Map<string, boolean>();
+  private loadingPromises = new Map<string, Promise<void>>();
+
+  async optimizeArabicFonts(language: string): Promise<void> {
+    if (language !== 'ar') return;
+
+    const fonts = [
+      {
+        family: 'Noto Sans Arabic',
+        weights: ['400', '500', '600', '700'],
+        display: 'swap'
+      }
+    ];
+
+    await Promise.all(fonts.map(font => this.loadFont(font)));
+  }
+
+  private async loadFont(fontConfig: {
+    family: string;
+    weights: string[];
+    display: string;
+  }): Promise<void> {
+    const cacheKey = `${fontConfig.family}-${fontConfig.weights.join(',')}`;
+    
+    if (this.fontCache.has(cacheKey)) return;
+    
+    if (this.loadingPromises.has(cacheKey)) {
+      return this.loadingPromises.get(cacheKey);
+    }
+
+    const loadPromise = this.performFontLoad(fontConfig, cacheKey);
+    this.loadingPromises.set(cacheKey, loadPromise);
+    
+    return loadPromise;
+  }
+
+  private async performFontLoad(
+    fontConfig: { family: string; weights: string[]; display: string },
+    cacheKey: string
+  ): Promise<void> {
+    try {
+      // Preload critical Arabic font weights
+      const link = document.createElement('link');
+      link.rel = 'preload';
+      link.as = 'font';
+      link.type = 'font/woff2';
+      link.crossOrigin = 'anonymous';
+      
+      // Use Google Fonts CDN with optimal parameters for Arabic
+      const weightParam = fontConfig.weights.join(';');
+      link.href = `https://fonts.googleapis.com/css2?family=${fontConfig.family.replace(/ /g, '+')}:wght@${weightParam}&display=${fontConfig.display}&subset=arabic`;
+      
+      document.head.appendChild(link);
+
+      // Create stylesheet link
+      const styleLink = document.createElement('link');
+      styleLink.rel = 'stylesheet';
+      styleLink.href = link.href;
+      
+      await new Promise<void>((resolve, reject) => {
+        styleLink.onload = () => resolve();
+        styleLink.onerror = () => reject(new Error(`Failed to load font: ${fontConfig.family}`));
+        document.head.appendChild(styleLink);
+      });
+
+      this.fontCache.set(cacheKey, true);
+      this.loadingPromises.delete(cacheKey);
+    } catch (error) {
+      console.warn(`Font loading failed for ${fontConfig.family}:`, error);
+      this.loadingPromises.delete(cacheKey);
+    }
+  }
+
+  // Performance monitoring for Arabic font rendering
+  measureArabicRenderPerformance(): {
+    renderTime: number;
+    layoutShift: number;
+    fontLoadTime: number;
+  } {
+    const startTime = performance.now();
+    
+    // Create test element with Arabic text
+    const testDiv = document.createElement('div');
+    testDiv.style.position = 'absolute';
+    testDiv.style.visibility = 'hidden';
+    testDiv.style.fontFamily = 'Noto Sans Arabic, Arial, sans-serif';
+    testDiv.style.fontSize = '16px';
+    testDiv.innerHTML = 'مرحباً بكم في منصة المساعد الذكي للمهنيين العمانيين';
+    
+    document.body.appendChild(testDiv);
+    
+    const initialHeight = testDiv.offsetHeight;
+    const renderTime = performance.now() - startTime;
+    
+    // Measure layout shift
+    setTimeout(() => {
+      const finalHeight = testDiv.offsetHeight;
+      const layoutShift = Math.abs(finalHeight - initialHeight) / initialHeight;
+      
+      document.body.removeChild(testDiv);
+      
+      return {
+        renderTime,
+        layoutShift,
+        fontLoadTime: renderTime
+      };
+    }, 100);
+
+    document.body.removeChild(testDiv);
+    
+    return {
+      renderTime,
+      layoutShift: 0,
+      fontLoadTime: renderTime
+    };
+  }
+}
+
+export const arabicFontOptimizer = new ArabicFontOptimizer();