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Performance

PDF Reader MCP is optimized for speed and efficiency.

Benchmarks

Benchmarks run on Node.js 22, measuring operations per second.

Operation Ops/sec Notes
Metadata only ~5,000 Fastest extraction mode
Single page text ~5,300 Minimal parsing
Full text (10 pages) ~4,500 Depends on content
With images ~2,000 Image encoding overhead

Optimization Tips

1. Request Only What You Need

// Fast - metadata only
{
  "sources": [{ "path": "doc.pdf" }],
  "include_metadata": true,
  "include_page_count": true,
  "include_full_text": false,
  "include_images": false
}

2. Use Page Ranges

Instead of full text extraction, request specific pages:

{
  "sources": [{
    "path": "doc.pdf",
    "pages": [1, 2]  // Only first two pages
  }],
  "include_full_text": false,
  "include_metadata": false,
  "include_page_count": false,
  "include_images": false
}

3. Batch Sources

Process multiple PDFs in one request for better throughput:

{
  "sources": [
    { "path": "doc1.pdf" },
    { "path": "doc2.pdf" },
    { "path": "doc3.pdf" }
  ],
  "include_full_text": true,
  "include_metadata": false,
  "include_page_count": false,
  "include_images": false
}

4. Avoid Images Unless Needed

Image extraction involves encoding to PNG and base64, which adds overhead:

// Slower
{ "include_images": true }

// Faster
{ "include_images": false }

Concurrency

The server processes multiple sources concurrently with a default limit of 3 simultaneous operations to prevent memory exhaustion.

File Size Limits

  • Maximum file size: 100MB
  • Files exceeding this limit will return an error

Memory Usage

Memory usage scales with:

  • Number of concurrent sources
  • PDF complexity
  • Image extraction enabled

For large PDFs or many concurrent requests, ensure adequate system memory.