20 lines of code that will beat A/B testing every time

A self-controlled, unsupervised optimal A/B Testing strategy that results in user-specific best choice for all variants!

With a simple 20-line change to how A/B testing works, that you can implement today, you can always do better than A/B testing -- sometimes, two or three times better. This method has several good points:

• It can reasonably handle more than two options at once.. Eg, A, B, C, D, E, F, G, �
• New options can be added or removed at any time.

Steve Hanov

Why Multi-armed Bandit Algorithm is Not “Better” than A/B Testing

Bandito, a Multi-Armed Bandit Tool for Content Testing