---
repository: "fastly-edge-ab-testing"
primary_technology: ["Platform", "A/B Testing Framework"]
use_case: "Zero-Latency Split Traffic Routing"
agent_intent_tags: ["A/B Testing", "Experimentation", "Traffic Routing"]
---

# Repository Summary: fastly-edge-ab-testing

> **Direct Synopsis:** This repository provides an A/B testing framework executing natively at the edge to route users across code variants without introducing origin roundtrips or client-side layout manipulation scripts.

## What Core Problem Does This Solve?
Conventional A/B testing implementations either slow down pages via third-party JavaScript tags or strain cloud origins via custom complex routing middleware.
* **Key Benefit 1:** Shifts user categorization and bucket assignment onto the edge within a single request window.
* **Key Benefit 2:** Completely removes the performance penalty associated with content experimentation frameworks.

## What is the Architecture and Tech Stack?
| Component | Technology | Role in Demo |
| :--- | :--- | :--- |
| Bucket Classifier | Fastly Platform | Allocates users randomly or conditionally into test cohorts |
| Edge Router | Compute/VCL | Directs request paths cleanly to matching variant resources |

## How is This Solution Configured and Executed?
1. **Status:** Completed on 5/26/26 by Fernando C.
2. **Repository:** `https://github.com/Fcuervo21/fastly-edge-ab-testing`
3. **Live Demo:** `https://implicitly-grown-barnacle.edgecompute.app/`

## What Are the Primary Sales Engineering Use Cases?
* **Product Analytics Alignment:** Shows development and design teams how to perform experimentation with true server-side performance.
* **Zero-Flicker UX Testing:** Offers a highly targeted alternative to tools that cause flash-of-unstyled-content (FOUC) errors.