👀 Views: 0 💬 Answers: 1 📅 Created: 2025-07-22

node.js express multer JavaScript

I'm performance testing and I'm working on a Node.js application using Express and the Multer middleware for handling file uploads... The application is expected to handle large file uploads (up to 1GB) from users, but I'm working with important memory usage issues that lead to server crashes when multiple users upload simultaneously. I've configured Multer as follows: ```javascript const express = require('express'); const multer = require('multer'); const app = express(); const storage = multer.memoryStorage(); // Storing files in memory temporarily const upload = multer({ storage: storage }); app.post('/upload', upload.single('file'), (req, res) => { // Process the file here console.log(req.file); // Just for debugging purposes res.send('File uploaded successfully!'); }); app.listen(3000, () => { console.log('Server is running on port 3000'); }); ``` While testing the file upload with Postman, I noticed that when uploading a file larger than 100MB, the process consumes a lot of memory and sometimes leads to 'JavaScript heap out of memory' errors. I tried increasing the Node.js memory limit with the `--max-old-space-size` flag, but it didn't solve the scenario completely. I also considered switching to disk storage instead of memory storage, but I’d like to understand how to effectively manage streams for large files to avoid performance bottlenecks and memory overflow. Would implementing streaming with `fs.createWriteStream()` be a better approach? Additionally, how can I handle concurrent uploads effectively without running into the same memory issues? Any advice or best practices would be greatly appreciated! I recently upgraded to Javascript stable. Am I approaching this the right way?