27. Build a Custom Stream in Node.js Without Using Streams! 🔥 Efficient File Copy

In this video, we’ll build a custom file streaming solution in Node.js — without using the built-in stream module!
We’ll walk step-by-step through reading and writing large files in chunks, optimizing for memory usage, and eliminating null characters (\x00) that can sneak into the final output.

📁 You'll learn how to:

Open source and destination files manually

Read files in 16KB chunks

Detect and remove trailing zeros from the final buffer

Handle large files (1GB, 10GB+) with minimal memory usage

Benchmark file copy speed and memory footprint

💡 Perfect for Node.js developers who want to understand how streams work under the hood and build a deeper intuition about backpressure, buffers, and manual streaming.

Don’t miss the next video where we’ll compare this with real Node.js streams and pipe()!

👍 Like, 💬 Comment, and 🔔 Subscribe if you find this useful!

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