NGINX is a high-performance, event-driven web server and reverse proxy that also provides load balancing, HTTP caching, TLS termination, and API gateway features; it’s commonly used to serve static content and proxy requests to application backends.

NGINX is characterized by three key components:

• Event-driven concurrency: asynchronous, non-blocking architecture for high connection concurrency and low memory footprint.
• Reverse proxy & load balancing: efficiently distributes traffic, terminates TLS, and caches responses.
• Extensible configuration & modules: rich configuration language and modules for authentication, rate limiting, gRPC proxying, etc.

NGINX is central to modern web stacks for performance, reliability, and operational control of web and API traffic. For Arm-based servers (e.g., Ampere Altra), it delivers high throughput with favorable performance-per-watt, making it a popular frontend for scale-out services on Arm infrastructure.

• NGINX Home
• NGINX blog on Arm optimizations / case studies: https://www.nginx.com/blog/ (search for Arm content)
• NGINX on Ampere Altra performance resources
• TLS and HTTP/2 recommendations: IETF HTTP specs