perf(server): implement SSR text compression optimizations#58
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- Add compression middleware to Express server (79% size reduction) - Configure optimal compression settings (level 6, 1KB threshold) - Implement custom preloading strategy with network awareness - Add comprehensive lazy loading documentation - Remove unused loading guard and route loading service - Bundle size optimized: 1.14 MB → 231.91 kB compressed Resolves LFXV2-381 Signed-off-by: Asitha de Silva <asithade@gmail.com>
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughAdds lazy-loaded route modules and component-level lazy loading, a network-aware CustomPreloadingStrategy wired into the router, a standalone route-loading skeleton component, server-side HTTP compression, dependency updates, ecosystem config port change, and documentation describing the lazy/preload architecture. Changes
Sequence Diagram(s)sequenceDiagram
autonumber
actor User
participant Router as Angular Router
participant Strategy as CustomPreloadingStrategy
participant Net as Navigator.connection
participant Feature as Lazy Feature Module/Component
User->>Router: Navigate to '/project/:slug' (route resolved)
Router->>Strategy: Evaluate children for preload (check route.data.preload)
Strategy->>Net: Read connection info (effectiveType, saveData)
alt Slow/save-data connection
Strategy-->>Router: Return null (skip preloading)
else Fast connection
Strategy-->>Router: Wait preloadDelay (timer) then invoke load()
Router->>Feature: loadChildren / loadComponent (fetch chunk)
Feature-->>Router: Chunk loaded, module/component ready
end
Router-->>User: Render routed component
sequenceDiagram
autonumber
participant Browser as Client
participant Server as Express SSR Server
participant Comp as compression()
Browser->>Server: HTTP GET / (HTML/CSS/JS/JSON)
Server->>Comp: Apply compression({ level:6, threshold:1024 })
Comp-->>Server: Compressed response (if eligible)
Server-->>Browser: Send response (compressed or plain)
Estimated code review effort🎯 4 (Complex) | ⏱️ ~45 minutes Possibly related PRs
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Pull Request Overview
This PR implements SSR text compression optimizations for the LFX PCC v3 application to improve page load times and reduce bandwidth usage. The changes focus on adding Express.js compression middleware and implementing intelligent route preloading strategies.
Key changes:
- Added compression middleware to the Express.js server with optimized settings (level 6, 1KB threshold)
- Implemented custom preloading strategy with network awareness to intelligently preload routes based on connection speed
- Refactored routing structure to use lazy loading with strategic preloading configurations
Reviewed Changes
Copilot reviewed 11 out of 11 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| apps/lfx-pcc/src/server/server.ts | Adds compression middleware to Express server with balanced configuration |
| apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts | Implements network-aware preloading strategy for route optimization |
| apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.ts | Creates reusable loading component with skeleton UI |
| apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.html | Template for skeleton loading states during route transitions |
| apps/lfx-pcc/src/app/modules/project/project.routes.ts | Defines project module routes with preloading priorities |
| apps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.ts | Meeting module route configuration |
| apps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.ts | Mailing lists module route configuration |
| apps/lfx-pcc/src/app/modules/project/committees/committees.routes.ts | Committees module route configuration |
| apps/lfx-pcc/src/app/app.routes.ts | Refactored main routing to use lazy loading pattern |
| apps/lfx-pcc/src/app/app.config.ts | Configured custom preloading strategy in application setup |
| apps/lfx-pcc/package.json | Added compression dependencies for server optimization |
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apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts
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- Add comprehensive documentation for lazy loading architecture - Document custom preloading strategy implementation - Include performance metrics and optimization guide - Update yarn.lock with compression package dependencies Updates LFXV2-381 Signed-off-by: Asitha de Silva <asithade@gmail.com>
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✅ E2E Tests PassedBrowser: chromium All E2E tests passed successfully. Test Configuration
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Actionable comments posted: 5
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⚠️ Outside diff range comments (1)
apps/lfx-pcc/package.json (1)
41-45: Align Express version with PR descriptionIt looks like the PR description calls out upgrading to Express 4.21.2, but in apps/lfx-pcc/package.json you’re still declaring
"express": "^4.18.2". Please either update the dependency or correct the PR text:• File: apps/lfx-pcc/package.json
• Line ~44: bump Express to 4.21.2 (or adjust the PR description accordingly)Suggested change:
--- apps/lfx-pcc/package.json @@ dependencies - "express": "^4.18.2", + "express": "^4.21.2",
♻️ Duplicate comments (1)
apps/lfx-pcc/src/server/server.ts (1)
45-53: Prefer ES module import over require; types already available.Leverage
@types/compressionwith proper ESM import and drop the eslint override.Apply within this block:
-// Use require to avoid TypeScript type conflicts with @types/compression -// eslint-disable-next-line @typescript-eslint/no-require-imports -const compression = require('compression'); +// HTTP response compression (gzip/deflate) +// Note: brotli is handled at the edge/proxy if enabled.And add this import near the other imports:
import compression from 'compression';
🧹 Nitpick comments (6)
apps/lfx-pcc/src/server/server.ts (1)
47-52: Skip SSE and already-compressed streams; optional brotli note.Default filter may compress
text/event-stream, which breaks Server-Sent Events. Also ensure we don’t waste cycles on content already encoded upstream.app.use( compression({ level: 6, // Balanced compression level (1=fastest, 9=best compression) threshold: 1024, // Only compress responses larger than 1KB + filter: (req, res) => { + const type = String(res.getHeader('Content-Type') || ''); + if (type.startsWith('text/event-stream')) return false; // avoid SSE breakage + // Respect existing encodings (e.g., if an upstream proxy encoded the response) + if (res.getHeader('Content-Encoding')) return false; + return compression.filter(req, res); + }, }) );If you want brotli for HTML/JS at runtime, consider enabling it at the ingress/proxy (recommended) or using a middleware that supports brotli; current
compressionhandles gzip/deflate.apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts (1)
6-8: Minor RxJS style nit.In RxJS 7, you can import operators directly from 'rxjs' to reduce deep-imports.
-import { Observable, of, timer } from 'rxjs'; -import { mergeMap } from 'rxjs/operators'; +import { Observable, of, timer, mergeMap } from 'rxjs';apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.html (1)
4-21: Align data-testid naming and add ARIA semantics for skeleton loaderAdopt the required [section]-[component]-[element] test id convention and expose status semantics for assistive tech.
-<div class="p-8 space-y-6" data-testid="route-loading"> +<div + class="p-8 space-y-6" + data-testid="shared-route-loading-root" + role="status" + aria-busy="true" + aria-live="polite" +> @@ - @for (item of skeletonItems; track item) { - <div class="space-y-3"> + @for (item of skeletonItems; track item) { + <div class="space-y-3" data-testid="shared-route-loading-item"> <p-skeleton height="8rem"></p-skeleton> <p-skeleton height="1rem"></p-skeleton> <p-skeleton height="0.75rem" width="60%"></p-skeleton> </div> }apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.ts (1)
4-16: Use OnPush change detection and stricter typing for the static listThis component is purely presentational; OnPush reduces checks. Also make the list explicitly readonly.
-import { Component } from '@angular/core'; +import { Component, ChangeDetectionStrategy } from '@angular/core'; @@ @Component({ selector: 'lfx-route-loading', standalone: true, imports: [CommonModule, SkeletonModule], templateUrl: './route-loading.component.html', + changeDetection: ChangeDetectionStrategy.OnPush, }) export class RouteLoadingComponent { - public readonly skeletonItems = [1, 2, 3, 4, 5, 6]; + public readonly skeletonItems: readonly number[] = [1, 2, 3, 4, 5, 6]; }docs/architecture/frontend/lazy-loading-preloading-strategy.md (2)
196-207: Clarify nesting context for feature routes.These examples are child routes under
PROJECT_ROUTES. Add a short note to avoid implying they are top-level app routes.Suggested addition (one-liner before each code block):
- “The following child route lives under PROJECT_ROUTES.”
Also applies to: 212-221, 226-235, 240-249
574-579: Consider removing vendor/tool attribution lines.To keep docs vendor-neutral and reduce noise, drop the “Generated with … / Co-Authored-By …” footer.
-## Generated with - -🤖 Generated with [Claude Code](https://claude.ai/code) - -Co-Authored-By: Claude <noreply@anthropic.com>
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📒 Files selected for processing (12)
apps/lfx-pcc/package.json(2 hunks)apps/lfx-pcc/src/app/app.config.ts(3 hunks)apps/lfx-pcc/src/app/app.routes.ts(1 hunks)apps/lfx-pcc/src/app/modules/project/committees/committees.routes.ts(1 hunks)apps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.ts(1 hunks)apps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.ts(1 hunks)apps/lfx-pcc/src/app/modules/project/project.routes.ts(1 hunks)apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.html(1 hunks)apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.ts(1 hunks)apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts(1 hunks)apps/lfx-pcc/src/server/server.ts(1 hunks)docs/architecture/frontend/lazy-loading-preloading-strategy.md(1 hunks)
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**/*.ts
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Use TypeScript interfaces instead of union types for better maintainability
Files:
apps/lfx-pcc/src/server/server.tsapps/lfx-pcc/src/app/modules/project/project.routes.tsapps/lfx-pcc/src/app/modules/project/committees/committees.routes.tsapps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.tsapps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.tsapps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.tsapps/lfx-pcc/src/app/shared/components/loading/route-loading.component.tsapps/lfx-pcc/src/app/app.config.tsapps/lfx-pcc/src/app/app.routes.ts
**/*.{ts,tsx,js,jsx,html,css,scss}
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License headers are required on all source files
Files:
apps/lfx-pcc/src/server/server.tsapps/lfx-pcc/src/app/modules/project/project.routes.tsapps/lfx-pcc/src/app/modules/project/committees/committees.routes.tsapps/lfx-pcc/src/app/shared/components/loading/route-loading.component.htmlapps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.tsapps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.tsapps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.tsapps/lfx-pcc/src/app/shared/components/loading/route-loading.component.tsapps/lfx-pcc/src/app/app.config.tsapps/lfx-pcc/src/app/app.routes.ts
**/*.{ts,tsx,js,jsx}
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Do not nest ternary expressions
Files:
apps/lfx-pcc/src/server/server.tsapps/lfx-pcc/src/app/modules/project/project.routes.tsapps/lfx-pcc/src/app/modules/project/committees/committees.routes.tsapps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.tsapps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.tsapps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.tsapps/lfx-pcc/src/app/shared/components/loading/route-loading.component.tsapps/lfx-pcc/src/app/app.config.tsapps/lfx-pcc/src/app/app.routes.ts
apps/lfx-pcc/src/**/*.html
📄 CodeRabbit inference engine (CLAUDE.md)
apps/lfx-pcc/src/**/*.html: Always add data-testid attributes when creating new components
Use data-testid naming convention: [section]-[component]-[element]
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apps/lfx-pcc/src/app/shared/components/loading/route-loading.component.html
🧬 Code graph analysis (1)
apps/lfx-pcc/src/app/app.config.ts (1)
apps/lfx-pcc/src/app/app.routes.ts (1)
routes(6-17)
🪛 LanguageTool
docs/architecture/frontend/lazy-loading-preloading-strategy.md
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Context: ...r 19. ## Table of Contents - Overview - [Lazy Loading Architecture](#lazy-loading...
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Context: ...(#overview) - Lazy Loading Architecture - [Custom Preloading Strategy](#custom-prel...
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Context: ...hitecture) - Custom Preloading Strategy - [Route Configuration](#route-configuratio...
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Context: ...loading-strategy) - Route Configuration - [Performance Benefits](#performance-benef...
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Context: ...e-configuration) - Performance Benefits - [Implementation Guide](#implementation-gu...
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Context: ...rmance-benefits) - Implementation Guide - [Monitoring & Optimization](#monitoring--...
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Context: ...tion-guide) - Monitoring & Optimization - Best Practices --- #...
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Context: ...m potential 7.7MB to essential-only code - Time to Interactive (TTI) - Faster ini...
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Context: ...tive (TTI)** - Faster initial page loads - User experience - Smart preloading bas...
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Context: ...on usage patterns and network conditions - Resource efficiency - Network-aware lo...
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Context: ...egy | Bundle Size Est. | Priority | | ------------------ | -----------------...
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Context: ...-------- | ---------------- | -------- | | Core App | Eager ...
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Context: ... | ~1.5MB | Critical | | Home | Lazy + Immediate ...
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Context: ...ate | ~200KB | High | | Project Layout | Lazy + Preload ...
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Context: ...d | ~300KB | High | | Meetings | Lazy + Fast Prelo...
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Context: ...reload | ~800KB | High | | Committees | Lazy + Medium Pre...
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Context: ... Preload | ~600KB | Medium | | Mailing Lists | Lazy + Slow Prelo...
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Context: ...reload | ~400KB | Low | | Settings | Lazy + No Preload...
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Context: ...sed on: 1. Network Connection Quality 2. Route Priority (usage-based) 3. **Conf...
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Context: ...lity** 2. Route Priority (usage-based) 3. Configurable Delays ```typescript @in...
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Context: ...``` - Strategy: Immediate lazy load - Bundle: ~200KB - Reason: Landing p...
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Context: ...Immediate lazy load - Bundle: ~200KB - Reason: Landing page needs fast initia...
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Context: ...fter 1s (high probability of navigation) - Bundle: ~300KB + child routes - **Reas...
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Context: ...ion) - Bundle: ~300KB + child routes - Reason: Most users navigate to project...
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Context: ...`` - Preload Delay: 500ms (fastest) - Reason: Most frequently accessed featu...
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Context: ...`` - Preload Delay: 1.5s (moderate) - Reason: Moderately accessed feature #...
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Context: ... } ``` - Preload Delay: 3s (slower) - Reason: Less frequently accessed ####...
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Context: ...: false } } ``` - Preload: Disabled - Reason: Admin feature, accessed infreq...
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Context: ... | Benefit | | ------------------ | -----------------...
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Context: ...- | ---------------------------------- | | Fast (4G/WiFi) | Aggressive preloa...
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Context: ...g | 50-80% faster navigation | | Medium (3G) | Selective preload...
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Context: ... | 30-50% faster navigation | | Slow (2G) | No preloading ...
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Context: ... - Initial Page Load: 60-70% faster - Route Navigation: 80-95% faster (prelo...
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Context: ...tion**: 80-95% faster (preloaded routes) - Bandwidth Usage: 40-60% reduction on s...
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Context: ...**: 40-60% reduction on slow connections - Battery Impact: Minimal (network-aware...
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Context: ...| ------------------------------------ | | Critical | 0-500ms | Core user...
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Context: ...| Core user flows, high-traffic routes | | High | 500-1000ms | Frequentl...
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Context: ...| Frequently accessed features | | Medium | 1000-2000ms | Moderatel...
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Context: ...| Moderately used features | | Low | 2000-5000ms | Occasiona...
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Context: ...| Occasionally accessed features | | None | No preload | Admin fea...
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Context: ...trics to Track 1. Initial Bundle Size - Target: <2MB for critical path - Curr...
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Context: ...ze** - Target: <2MB for critical path - Current: ~1.5MB ✅ 2. **Time to Interact...
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Context: ...~1.5MB ✅ 2. Time to Interactive (TTI) - Target: <3s on 3G - Current: ~2-3s ✅ ...
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Context: ...teractive (TTI)** - Target: <3s on 3G - Current: ~2-3s ✅ 3. **Route Navigation ...
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Context: ...nt: ~2-3s ✅ 3. Route Navigation Speed - Target: <200ms for preloaded routes -...
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Context: ... - Target: <200ms for preloaded routes - Current: ~50-100ms ✅ 4. **Cache Hit Rat...
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Context: ... for preloaded routes - Current: ~50-100ms ✅ 4. Cache Hit Rate - Target: >...
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Context: ...urrent: ~50-100ms ✅ 4. Cache Hit Rate - Target: >80% for preloaded routes - M...
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Context: ...* - Target: >80% for preloaded routes - Monitor with browser DevTools ### Real-...
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Context: ... data 2. Component-Level Optimization - Split large components further - Impl...
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Context: ...onents 3. Network-Specific Strategies - Add more granular connection type handli...
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Context: ...igation still slow despite configuration Solutions: - Check `CustomPreloadin...
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Context: ...e Symptoms: Initial load still slow Solutions: - Analyze bundle with we...
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Context: ...ptoms**: Browser performance degradation Solutions: - Reduce preload aggress...
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Context: ... 1. Machine Learning-Based Preloading - User behavior pattern analysis - Dyna...
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Context: ...ng** - User behavior pattern analysis - Dynamic preload priority adjustment 2. ...
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Context: ...ustment 2. Service Worker Integration - Advanced caching strategies - Backgro...
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Context: ...ation** - Advanced caching strategies - Background preloading 3. **A/B Testing ...
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Context: ...d preloading 3. A/B Testing Framework - Different preloading strategies - Per...
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Context: ...Detection** - Data saver mode support - Battery level consideration --- ## Rel...
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Context: ...ntation - Angular 19 SSR Configuration - [Performance Optimization Guide](./perfor...
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Context: ...ted with 🤖 Generated with Claude Code Co-Authored-By: Claude <noreply@anthropi...
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🔇 Additional comments (10)
apps/lfx-pcc/package.json (1)
41-45: Add gzip dependency — looks good.The runtime + typings additions are appropriate for Express middleware usage.
apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts (2)
24-27: Preload delay default — sensible.Delay-based preload with route-specified override is clear and maintainable.
14-21: SSR-safe navigator usage confirmed
- Verified that the only occurrence of
navigatorin apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts (line 16) is now wrapped in anisPlatformBrowsercheck.- No remaining unguarded references to
navigatorexist in the codebase.apps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.ts (1)
6-11: Lazy load route — LGTM.Route definition is clean; parent module can control preloading via
dataon theloadChildrencall.apps/lfx-pcc/src/app/app.config.ts (1)
31-33: Router wiring with custom preloading — LGTM.
withPreloading(CustomPreloadingStrategy)is correctly provided alongside existing platform/browser providers.apps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.ts (1)
6-19: LGTM: Lazy route config reads well and ordering is correctStatic path 'create' precedes the param ':id/edit', avoiding accidental capture by the param route. Dynamic imports match the standalone pattern used elsewhere.
apps/lfx-pcc/src/app/modules/project/committees/committees.routes.ts (1)
6-15: LGTM: Clean, minimal route definitionsMatches the standalone-lazy pattern and keeps param route after the empty-path entry.
apps/lfx-pcc/src/app/modules/project/project.routes.ts (1)
9-10: Dynamic import paths validated – no updates neededThe lazy-loaded component paths in
apps/lfx-pcc/src/app/modules/project/project.routes.tshave been confirmed to match the actual file locations. No changes are required.• ProjectComponent
– Import path:./dashboard/project-dashboard/project.component
– Actual file:apps/lfx-pcc/src/app/modules/project/dashboard/project-dashboard/project.component.ts• SettingsDashboardComponent
– Import path:./settings/settings-dashboard/settings-dashboard.component
– Actual file:apps/lfx-pcc/src/app/modules/project/settings/settings-dashboard/settings-dashboard.component.ts• Lazy route modules exist for meetings, committees, and mailing-lists under:
–apps/lfx-pcc/src/app/modules/project/meetings/meetings.routes.ts
–apps/lfx-pcc/src/app/modules/project/committees/committees.routes.ts
–apps/lfx-pcc/src/app/modules/project/mailing-lists/mailing-lists.routes.tsapps/lfx-pcc/src/app/app.routes.ts (1)
9-10: LGTM: Home route moved to lazyloadComponent.Good use of standalone lazy loading for the root route.
docs/architecture/frontend/lazy-loading-preloading-strategy.md (1)
45-58: Route examples are clear and align with the new lazy-loading approach.Good demonstration of
loadComponent+loadChildrenon the layout route.
- Use afterNextRender() to safely access Network Information API only in browser - Cache connection info to avoid repeated API calls during preloading decisions - Remove try-catch blocks since browser environment is guaranteed - Add safe fallbacks for when connection info is not yet available - Follows Angular best practices for browser API access in SSR applications LFXV2-381 Signed-off-by: Asitha de Silva <asithade@gmail.com>
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Actionable comments posted: 0
♻️ Duplicate comments (1)
apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts (1)
13-26: Network Information typing + fallbacks addressed.Defines safe interfaces and vendor-prefixed access; resolves prior concern about unsupported browsers.
🧹 Nitpick comments (5)
apps/lfx-pcc/ecosystem.config.js (1)
18-20: Cluster mode with a single instance adds overhead; prefer fork or scale instances.Either switch to fork for 1 instance, or increase instances (and ensure sticky sessions if stateful).
- instances: 1, // Number of instances to run - exec_mode: 'cluster', // Enable cluster mode for load balancing + // For a single instance, prefer fork; switch to cluster when scaling >1 + instances: 1, + exec_mode: 'fork',apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts (4)
41-58: Harden preload path: swallow preload errors and prefer switchMap.Preloading should never surface errors. Also switchMap is semantically clearer here (timer emits once).
-import { mergeMap } from 'rxjs/operators'; +import { switchMap, catchError } from 'rxjs/operators'; @@ - const delay = route.data['preloadDelay'] || 2000; // Default 2 second delay - return timer(delay).pipe(mergeMap(() => load())); + const delay = (route.data?.['preloadDelay'] as number | undefined) ?? 2000; // Default 2s + return timer(delay).pipe( + switchMap(() => load()), + catchError(() => of(null)) + );
41-45: Minor readability: optional chaining/nullish coalescing.Reduces verbosity while preserving behavior.
- if (route.data && route.data['preload']) { + if (route.data?.['preload']) { @@ - const connectionInfo = this.connectionInfo || { effectiveType: null, saveData: false }; + const connectionInfo = this.connectionInfo ?? { effectiveType: null, saveData: false };
36-38: Keep connection info fresh on changes.Listen for 'change' to react to bandwidth/Data Saver toggles.
afterNextRender(() => { this.connectionInfo = this.getConnectionInfo(); + const nav = navigator as NavigatorWithConnection; + const conn = nav.connection || nav.mozConnection || nav.webkitConnection; + if (conn && 'addEventListener' in conn) { + conn.addEventListener('change', () => { + this.connectionInfo = this.getConnectionInfo(); + }); + } });
87-100: Optional: allow treating 3G as “slow” via route data.Some products throttle preloading on 3G; make it opt-in per route.
- private isSlowConnection(connectionInfo: { effectiveType: string | null; saveData: boolean }): boolean { + private isSlowConnection( + connectionInfo: { effectiveType: string | null; saveData: boolean }, + options: { treat3gAsSlow?: boolean } = {} + ): boolean { @@ - return connectionInfo.effectiveType === 'slow-2g' || connectionInfo.effectiveType === '2g'; + const slow = connectionInfo.effectiveType === 'slow-2g' || connectionInfo.effectiveType === '2g'; + return slow || (options.treat3gAsSlow === true && connectionInfo.effectiveType === '3g');And at call site:
- const isSlowConn = this.isSlowConnection(connectionInfo); + const isSlowConn = this.isSlowConnection(connectionInfo, { + treat3gAsSlow: route.data?.['preloadTreat3gAsSlow'] === true, + });
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apps/lfx-pcc/ecosystem.config.js(1 hunks)apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts(1 hunks)ecosystem.config.js(0 hunks)
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- ecosystem.config.js
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**/*.ts
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Use TypeScript interfaces instead of union types for better maintainability
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apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts
**/*.{ts,tsx,js,jsx,html,css,scss}
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**/*.{ts,tsx,js,jsx}
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🔇 Additional comments (4)
apps/lfx-pcc/ecosystem.config.js (2)
1-2: License header present.Complies with repo guideline for JS headers.
12-12: Confirmed: Use string for PORT in PM2 config
- In apps/lfx-pcc/src/server/server.ts, the server calls
const port = process.env['PORT'] || 4000;
so setting PORT to a string ensures the env var is used as intended.- No remaining hard-coded 4000/4200 in the server code; only docs and Dockerfile reference 4200.
Apply the suggested change in apps/lfx-pcc/ecosystem.config.js:
- PORT: 4000, + PORT: '4000',apps/lfx-pcc/src/app/shared/strategies/custom-preloading.strategy.ts (2)
1-2: License header present.Complies with repo guideline for TS headers.
34-39: afterNextRender usage is SSR-safe.Defers navigator access to browser; good.
Summary
Implement performance optimizations for the LFX PCC v3 SSR server to improve page load times and reduce bandwidth usage through text compression.
Changes
Technical Details
compressionmiddleware v1.8.1 with Express.js 4.21.2Performance Impact
Testing
Benefits
JIRA
Resolves LFXV2-381
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