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BULK_EXTRACTION_FIX_v3.6.5.md

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🔧 Bulk Extraction Crash Fix - Version 3.6.5

🎯 Problem Identified

The extension was closing after extracting 2-3 transcripts during bulk operations. This was caused by:

  1. Memory accumulation from AI model processing
  2. Aggressive memory limits causing premature cleanup
  3. Rapid processing cycles without proper delays
  4. Offscreen document instability during bulk operations

✅ Fixes Applied

1. Memory Management Optimization

Background Script (public/background.js)

  • Reduced MAX_PROCESSING_COUNT: 15 → 5 operations before cleanup
  • Reduced MEMORY_CLEANUP_INTERVAL: 60s → 30s for more frequent cleanup
  • Optimized queue management: Keep only last 3 requests (was 5)

Offscreen Document (src/offscreen.ts)

  • Reduced memory limit: 500MB → 300MB for better stability
  • Reduced MAX_PROCESSING_COUNT: 10 → 3 operations before cleanup
  • Added cleanup delays: 1-2 second delays to prevent rapid cycles
  • Improved memory monitoring: Better detection of high memory usage

2. Content Script Optimization

Batch Processing (src/lib/content-script.ts)

  • Increased delay between operations: 1s → 2s to prevent memory buildup
  • Reduced transcript truncation limit: 50KB → 30KB for better memory management
  • Added memory optimization logging for better debugging

3. Error Handling Improvements

  • Added delays after cleanup to prevent rapid cleanup cycles
  • Better error recovery in memory management functions
  • Improved logging for debugging memory issues

🚀 Expected Results

Before Fix (v3.6.4)

  • ❌ Extension closes after 2-3 transcript extractions
  • ❌ Memory accumulation causes crashes
  • ❌ No recovery mechanism

After Fix (v3.6.5)

  • ✅ Extension handles 10+ transcript extractions without closing
  • ✅ Proactive memory management prevents crashes
  • ✅ Automatic cleanup and recovery
  • ✅ Better stability during bulk operations

📊 Performance Improvements

Memory Management

  • Cleanup frequency: Every 3 operations (was 10-15)
  • Memory limit: 300MB (was 500MB)
  • Cleanup delays: 1-2 seconds to prevent rapid cycles

Batch Processing

  • Operation delays: 2 seconds between extractions
  • Transcript limits: 30KB max per transcript
  • Queue management: Keep only 3 recent requests

🔧 Technical Details

Memory Cleanup Process

  1. Trigger: Every 3 operations OR 30 seconds
  2. Actions:
    • Dispose AI pipelines
    • Close stale offscreen documents
    • Force garbage collection
    • Clear request queues
  3. Delays: 1-2 seconds to prevent rapid cycles

Batch Processing Flow

  1. Extract transcript from current lecture
  2. Wait 2 seconds for memory management
  3. Truncate if > 30KB to prevent memory issues
  4. Store in batch state with progress tracking
  5. Navigate to next lecture and repeat

📦 Deployment Package

File: transcript-extractor-extension-v3.6.5-bulk-fix.zip
Size: ~3.8MB
Status: Ready for testing

Testing Instructions

  1. Load the extension in Chrome
  2. Navigate to a Udemy course with multiple lectures
  3. Start bulk extraction using "Next" mode
  4. Verify the extension doesn't close after 2-3 extractions
  5. Test with 10+ lectures to confirm stability

🎉 Ready for Use

This version should resolve the bulk extraction crash issue and provide stable performance for extracting multiple transcripts in sequence.

Version: 3.6.5
Status: Bulk extraction crash fix applied
Testing: Ready for user validation