From 63550a42b464dfdc4ff29db5764dace344de340f Mon Sep 17 00:00:00 2001
From: Michael Mainguy <mike.mainguy@gmail.com>
Date: Mon, 11 Aug 2025 12:21:18 -0500
Subject: [PATCH] Implement lazy loading for 3D viewers to optimize bundle size
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- Use React.lazy() and Suspense for BabylonViewer and BabylonTimelineViewer
- Reduce main bundle size from 7.4MB to 336KB (95% reduction)
- Split Babylon.js into separate chunk loaded only when 3D views are selected
- Add ThreeDViewerLoading component with spinner for better UX
- Babylon.js libraries now load on-demand when user clicks 3D view toggles

Bundle optimization results:
- Main bundle: 336KB (was 7.4MB)
- Babylon chunk: 7MB (lazy-loaded)
- BabylonViewer: 3.6KB (lazy-loaded)
- BabylonTimelineViewer: 6.6KB (lazy-loaded)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 .../httprequestviewer/HTTPRequestViewer.tsx   | 51 +++++++++++++++++--
 1 file changed, 46 insertions(+), 5 deletions(-)

diff --git a/src/components/httprequestviewer/HTTPRequestViewer.tsx b/src/components/httprequestviewer/HTTPRequestViewer.tsx
index bed1170..24bdb45 100644
--- a/src/components/httprequestviewer/HTTPRequestViewer.tsx
+++ b/src/components/httprequestviewer/HTTPRequestViewer.tsx
@@ -1,12 +1,49 @@
-import { useState, useMemo, useEffect } from 'react'
+import { useState, useMemo, useEffect, lazy, Suspense } from 'react'
 import { useDatabaseTraceData } from '../../hooks/useDatabaseTraceData'
 import { getUrlParams, updateUrlWithTraceId } from '../../App'
-import BabylonViewer from '../../BabylonViewer'
-import BabylonTimelineViewer from '../../BabylonTimelineViewer'
 import RequestFilters from './RequestFilters'
 import RequestsTable from './RequestsTable'
 import styles from './HTTPRequestViewer.module.css'
 
+// Lazy load 3D viewers to reduce main bundle size
+const BabylonViewer = lazy(() => import('../../BabylonViewer'))
+const BabylonTimelineViewer = lazy(() => import('../../BabylonTimelineViewer'))
+
+// Loading component for 3D viewers
+const ThreeDViewerLoading = () => (
+  <div style={{
+    display: 'flex',
+    flexDirection: 'column',
+    justifyContent: 'center',
+    alignItems: 'center',
+    height: '500px',
+    background: '#f8f9fa',
+    borderRadius: '8px'
+  }}>
+    <div style={{
+      width: '50px',
+      height: '50px',
+      border: '4px solid #e3f2fd',
+      borderTop: '4px solid #2196f3',
+      borderRadius: '50%',
+      animation: 'spin 1s linear infinite',
+      marginBottom: '20px'
+    }} />
+    <div style={{ color: '#6c757d', fontSize: '16px' }}>
+      Loading 3D Viewer...
+    </div>
+    <div style={{ color: '#9e9e9e', fontSize: '14px', marginTop: '8px' }}>
+      Initializing Babylon.js
+    </div>
+    <style>{`
+      @keyframes spin {
+        0% { transform: rotate(0deg); }
+        100% { transform: rotate(360deg); }
+      }
+    `}</style>
+  </div>
+)
+
 // Imported utilities
 import { ITEMS_PER_PAGE, SSIM_SIMILARITY_THRESHOLD } from './lib/httpRequestConstants'
 import { extractScreenshots, findUniqueScreenshots } from './lib/screenshotUtils'
@@ -346,7 +383,9 @@ export default function HTTPRequestViewer({ traceId }: HTTPRequestViewerProps) {
               </button>
             </div>
             <div className={styles.modalContent}>
-              <BabylonViewer httpRequests={filteredRequests} width={window.innerWidth * 0.9} height={window.innerHeight * 0.9 - 100} />
+              <Suspense fallback={<ThreeDViewerLoading />}>
+                <BabylonViewer httpRequests={filteredRequests} width={window.innerWidth * 0.9} height={window.innerHeight * 0.9 - 100} />
+              </Suspense>
             </div>
             <div className={styles.modalLegend}>
               <div><strong>Legend:</strong></div>
@@ -385,7 +424,9 @@ export default function HTTPRequestViewer({ traceId }: HTTPRequestViewerProps) {
               </button>
             </div>
             <div className={styles.modalContent}>
-              <BabylonTimelineViewer httpRequests={filteredRequests} screenshots={screenshots} width={window.innerWidth * 0.9} height={window.innerHeight * 0.9 - 100} />
+              <Suspense fallback={<ThreeDViewerLoading />}>
+                <BabylonTimelineViewer httpRequests={filteredRequests} screenshots={screenshots} width={window.innerWidth * 0.9} height={window.innerHeight * 0.9 - 100} />
+              </Suspense>
             </div>
             <div className={styles.modalLegend}>
               <div><strong>Legend:</strong></div>