Test Execution Time and Running Web-UI Tests in Parallel

Tools

Selenium Grid

Parallel Cucumber

SWARM (cloud based browser test tool)

parallel and parallel-tests ruby gems

Methods

Distributing tests across multiple test executor slave/nodes

Limiting tests on each branch to only the functionality that is being changed in that branch. (Doing the full set of tests on the master branch only)

Testing against each component individually. (Not trying to test the whole software stack in one set of tests.)