Performax - The art of performance engineering


Bernie's expertise with OpenSTA and performance testing principles in general were immeasurable in helping our team meet our goals of performance characterization in a short time frame. Performax provided an enhanced version of OpenSTA and an intelligent script editor (Script Buddy) which automates a great deal of what Bernie teaches about scripting and cut our script development time from 2 days to 2 hours. Not only did his performance testing knowledge help us meet our objectives, but we now have our own OpenSTA guru thanks to his hands on training and mentoring. OpenSTA is a robust tool and Bernie knows how to get the most from it.

Trent Malone, QA Manager, Claimtrust Inc

Bernie was instrumental in helping us get our OpenSTA implementation off the ground. Bernie's method of using the actual website during the training sessions produced re-usable assets, which is a very effective way of learning the tool. With the training and Bernie's follow-up guidance and support we were able to refine our scripts and attain performance metrics very quickly. As we progressed through our capacity testing process Bernie continued to help and provided valuable feedback and insight. I would recommend Bernie and Performax to anyone seeking guidance with OpenSTA specifically or with their performance test project in general.

Kurt Wagner, QA Manager,

UPS Logistics Technologies

We searched for a load testing service provider with the experience, tools, and methodology necessary to ensure our new application delivered the highest level of performance, stability, and availability. We chose Performax based on their reputation, technical depth, and responsiveness. Performax's expertise and team approach kept our performance characterization project focused and on schedule. The recommendations made for improving production cluster capacity and availability have been implemented and their capacity planning guidelines will help us keep ahead of demand as our customer base grows. Performax is a pleasure to work with and I highly recommend using their services.

Greg Burke, Quality assurance analyst, UPSLT

We wanted to use OpenSTA to load test our new web service but were concerned about the learning curve, support, and its ability to emulate our compressed SOAP messages. Performax modified OpenSTA to use our data compression methods and demonstrated it's feasibility before starting the project. Their commitment to our success reduced our risk and allowed us to realize the flexibility and cost savings expected from using an open source tool. Bernie Velivis at Performax is one of the best OpenSTA resources around and I highly endorse his expertise and commitment to customer service.

Matt Scher, Lead project developer, UPSLT

Deloitte Consulting LLP

Bernie is a master of performance characterization and all things performance related. His approach and methods are flawless and transcend the layman's need to thoroughly understand technology. I would highly recommend Bernie and Performax to any organization in need of his skills.

Dan Magni, Deloitte Consulting LLP (former CEO BeaconVision Inc)


Performax was very helpful in helping us develop and implement a rapid performance measurement and improvement plan. Bernie Velivis worked well with all levels of our development and services organizations to help meet the aggressive goals and timeframes. In a short time, his adaptability, experience, and deep base of knowledge made him valuable to our company. I would definitely recommend using Performax again.

Brad Foohey, Vice President CheckFree Professional Services

AI2 Inc

Bernie's deep expertise and team approach enabled my extending a joint client highly-specialized services we otherwise would have been unable to provide. Adept in all aspects of performance engineering, Bernie resolved both batch and on-line performance issues mitigating significant exposure with their customers, and instituted a methodology for their predicting product performance.

Kevin Wagner, President AI2 Inc

Kaplan, Inc

We employed Bernie on several performance optimization efforts at Kaplan and were very satisfied with the results.  Bernie is diligient, very thorough, and explained the what's and how's of performance tuning.  With the results of each effort, each system in question was able to prepare for upcoming scalability in an educated manner.

David Yen, Executive Director Engineering, K12 Learning Services at Kaplan Inc


Bernie Velivis is a cornerstone of OpenSTA's community. Open Source projects rely on a community that is willing to help newbies & debate toolset issues. Bernie shares in-depth toolset knowledge & performance testing experience. As OpenSTA lead, I've been happy to have Performax sponsor OpenSTA development at accelerated rates to fit in with project timelines. Working with Bernie is always a pleasure.

Dan Sutcliffe, President tcNOW