𝗡𝗼𝗱𝗲.𝗷𝘀 𝗪𝗼𝗿𝗸𝗲𝗿 𝗧𝗵𝗿𝗲𝗮𝗱𝘀 𝗘𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱

𝗡𝗼𝗱𝗲.𝗷𝘀 𝗪𝗼𝗿𝗸𝗲𝗿 𝗧𝗵𝗿𝗲𝗮𝗱𝘀 𝗘𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱

Node.js runs JavaScript on one thread. Heavy tasks block this thread. Your server freezes for every user.

Worker threads solve this. A worker creates a new V8 isolate.

Each worker has:

• Its own memory heap.
• Its own event loop.
• Its own call stack.

Workers talk via message passing. This keeps data safe. Large objects slow this process. Node.js makes a copy of the data.

Use SharedArrayBuffer for more speed. Threads share the same raw memory. Use the Atomics API. It prevents data corruption.

Do not create workers for every request. This wastes RAM. Your server will crash.

Use a pool like Piscina. It creates a set number of workers. It matches your CPU cores. It keeps your RAM stable.

Keep your event loop clean. Move heavy CPU work to worker pools. Your backend stays fast.

Source: https://dev.to/aabiskar/deep-dive-nodejs-worker-threads-under-the-hood-16ge