The presentation is from Selenium Conf 2014, where this case study was recently presented.
The case study talks about a migration we did at TARLABS™ for one of our clients. The existing suite of QTP was migrated to Selenium. A custom C# based framework was developed. The framework is inspired from RobotFramework in Python.
The execution time in QTP with Single machine was 160 min and was reduced to 19 min using Selenium