Node.js vs Python: which backend excels in scalability and concurrency in 2025?

Compares the concurrency models, throughput, and typical use cases of Node.js and Python in real-world backend applications.

• Node.js leverages non-blocking, event-driven I/O and V8 engine optimizations to handle ~90K req/sec and sub 40ms latency in real-time workloads. • Python, hindered by its GIL, generally handles fewer simultaneous connections but shines in machine learning, analytics, and rapid-prototyping use cases using frameworks like Django, Flask, and FastAPI. Tags: nodejs, python, backend, performance, scalability