The tool is useful in scenarios where the requests have high response times.Many existing tools are developed for scenarios with high request rate and quick response times, and fail to keep up with load generation when server response times are high, as the number of outstanding requests becomes very large .HTML reports can be generated during the load to view response times measurement, server CPU, etc. Loadster - Load testing tool from Brickyard Technologies, Inc.oriented to testing websites, web applications, and HTTP web services; includes graphical script editor, live reporting, and unlimited virtual users.In contrast to many other event-based apps it doesn't use callbacks, instead using light-weight processes, through gevent.This allows you to write very expressive scenarios in Python without complicating your code with callbacks.Report designer tool enables design/configuration of customized load testing reports.Gatling - Open source stress-testing tool developed in Scala.
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Octo Perf - Commercial Saas online platform load testing service for web and mobile applications. Apica Loadtest - Offers flexible self service and full service load testing able to test 2MM concurrent users, through a network of 50 locations around the world.
Key features include: Record Virtual User, design realistic virtual users, run scenario from multiple locations (Europe, USA and more), analyze bench reports to find performance bottlenecks. Test on demand or automate testing throughout development lifecycles.
Based on an expressive DSL, the scenarios are self explanatory.
They are easy to maintain and can be kept in a version control system.