edge function
compound.compound. a small piece of computer code that runs very close to the user instead of on a far-away main server. This makes websites and apps respond much faster because the data does not have to travel as far.
compound. a serverless script executed at the network edge, typically within a Content Delivery Network (CDN) point of presence. By processing logic geographically closer to the end-user, it minimizes latency and reduces the load on origin servers.
The developer used an edge function to personalize the website for local users.
By deploying an edge function, the engineering team managed to reduce the page load time for international visitors by several hundred milliseconds.
Modern web architectures leverage edge functions to handle authentication and A/B testing at the edge, ensuring that the origin server only receives requests that have already been validated and routed.
A compound of edge, referring to the periphery of a network, and function, a term from mathematics and programming for a specific task or procedure. The construction follows the pattern of earlier cloud computing terminology such as edge computing and serverless functions.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Commonly used in the context of cloud computing and web development; often associated with platforms like Vercel, Netlify, or AWS CloudFront.
Last updated July 22, 2026