A memory leak occurred when processing some special PDF files.

node.js : v20.17.0 @opendocsg/pdf2md : v0.2.1 unpdf : 1.0.6 A memory leak occurred when I processed the following PDF file using the code below. I used @opendocsg/pdf2md, which indirectly calls unpdf `const fs = require('fs'); const pdf2md = require('@opendocsg/pdf2md'); const { PDFDocument } = require('pdf-lib'); async function splitPdfToBuffers(path, pagesPerChunk = 10) { const full = await PDFDocument.load(fs.readFileSync(path)); const total = full.getPageCount(); const buffers = []; for (let i = 0; i < total; i += pagesPerChunk) { const sub = await PDFDocument.create(); const indexes = [...Array(pagesPerChunk).keys()] .map(k => i + k) .filter(p => p < total); const copied = await sub.copyPages(full, indexes); copied.forEach(p => sub.addPage(p)); buffers.push(await sub.save()); // Uint8Array – 足够“完整 PDF” } return buffers; } // 辅助函数：打印当前内存使用情况 function logMemory(label) { const mem = process.memoryUsage(); console.log(`🧠 [${label}]`); console.log(` RSS: ${(mem.rss / 1024 / 1024).toFixed(2)} MB`); console.log(` HeapTotal: ${(mem.heapTotal / 1024 / 1024).toFixed(2)} MB`); console.log(` HeapUsed: ${(mem.heapUsed / 1024 / 1024).toFixed(2)} MB`); console.log(` External: ${(mem.external / 1024 / 1024).toFixed(2)} MB`); console.log('------------------------------------------'); } async function convertPdfToMarkdown(filePath) { try { logMemory("Start"); const chunks = await splitPdfToBuffers(filePath, 1); // 10 页一块 logMemory("After reading PDF into buffer"); let md = ''; for (let i = 0; i < chunks.length; i++) { const partMd = await pdf2md(Buffer.from(chunks[i])); md += partMd + '\n'; logMemory(`after chunk ${i + 1}/${chunks.length}`); } logMemory("After converting PDF to Markdown"); return md; } catch (err) { console.error("❌ 转换失败:", err); return null; } } (async () => { const filePath = 'C:/Users/zhou/Downloads/test-2.pdf'; const markdown = await convertPdfToMarkdown(filePath); logMemory("After convertPdfToMarkdown() finished"); if (markdown) { console.log("✅ 转换成功，Markdown 内容前 500 字符："); console.log(markdown.length); } })(); ` [test-2.pdf](https://github.com/user-attachments/files/20897281/test-2.pdf)