Scientist

Scientist is a Ruby library developed by GitHub that enables safe, data-driven refactoring by running both the existing ("control") and new ("candidate") code paths in production, comparing their results and performance, while returning only the original output. It empowers developers to validate new implementations without affecting user-facing behavior.

Features

Wraps code blocks as use {} (control) and try {} (candidate) for experimentation
Randomizes execution order to avoid bias
Measures execution time for both control and candidate
Compares outputs and logs mismatches or exceptions
Allows configurable control over when candidate runs (e.g. percentage, ignore)
Hooks for custom result publishing (e.g. dashboards, alerts)

Project Samples

Project Activity

See All Activity >

License

MIT License

Follow Scientist

Scientist Web Site

Other Useful Business Software

Our Free Plans just got better! | Auth0

With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.

Try free now

Rate This Project

User Reviews

Be the first to post a review of Scientist!

Additional Project Details

Programming Language

Ruby

Related Categories

Ruby Frameworks

Registered

2025-07-31

Similar Business Software

Ionic

The Ionic Platform allows you to bring your apps to market faster with an integrated app platform built on the leading cross-platform mobile SDK. Build, secure, and deliver new mobile apps—and transform existing ones—across iOS, Android, and Web platforms from a single codebase. Full...

See Software
Expo

Expo is an open source platform that enables developers to create universal native apps using React,.It offers a comprehensive ecosystem of tools and services designed to streamline the development, review, and deployment processes. With Expo, developers can initialize new projects or integrate...

See Software
Webix

JavaScript UI library and framework for speeding up web development. JS Framework for cross-platform web Apps development 102 UI widgets and feature-rich CSS / HTML5 JavaScript controls. Save at least 3000+ development hours by using ready-made widgets and UI controls. Develop Web UI 30% faster....

See Software
React

React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes. Declarative views make your code more predictable and easier to debug. Build encapsulated...

See Software
Kendo UI

Kendo UI is the ultimate collection of JavaScript UI components with libraries for jQuery, Angular, React, and Vue. Quickly build eye-catching, high-performance, responsive web applications—regardless of your JavaScript framework choice. Easily add advanced JavaScript components into your...

See Software
Mocha

Mocha runs in the browser. Every release of Mocha will have new builds of ./mocha.js and ./mocha.css for use in the browser. By adding an argument (usually named done) to it() to a test callback, Mocha will know that it should wait for this function to be called to complete the test. This...

See Software

Report inappropriate content