Is Node.js single-threaded?
Node.js is often described as single-threaded because JavaScript execution for a Node.js process normally occurs on a main thread. However, Node.js is not limited to one thread for all work. libuv can use a worker pool for certain operations, Worker Threads provide additional JavaScript threads, and child processes can run work independently. Therefore, saying Node.js is simply single-threaded is incomplete.
Key Takeaways
- The JavaScript execution model is primarily single-threaded.
- Node.js can use worker threads and child processes.
- libuv also provides a worker pool for certain operations.
Knowledge Check
Which statement best describes Node.js threading?