Load Testing Blog

Configuring Bearer Tokens for Load Testing

A  method of authentication that has become more popular these days is bearer tokens, which require some additional configuration in Load Tester.
You can first tell if a website uses bearer tokens because the site will throw 404 errors when attempting a playback.  Examing the headers will show a header entry called “Authorization” with the format shown below:

The value will appear one or more times.  Some sites just set the value once, and others will try and set it on different parts of a website.
The first thing to do is find where the value appears using the Search Tab … Continue reading »

Understanding Web Pages in Modern Web Apps

With the advent of AJAX and one-page applications, the concent of a “web page” as a single file with HTML is antiquated. A simple website where the user navigates from page to page has morphed into a web-based application, with complicated user interface elements that aren’t web pages in the traditional sense.
And yet for testing purposes, we need to separate the different stages of a workflow for a web-based application. In Load Tester, then, the concent of a “page” could be anything from a traditional HTML file to a single asynchronous AJAX call. The common denominator is each “page” is … Continue reading »

How to Convert Selenium Scripts to Virtual Browser Scripts

Web Performance has discontinued direct support for Selenium/WebDriver in Load Tester. One of the limitations of load testing with Selenium/Web Driver is that it takes lots and lots of cloud machines to generate load. Virtual users, on the other hand, are very efficient, cheaply simulating up to millions of users. This blog post shows one possible option, playing back your selenium scripts directly into the Load Tester recorder where they can be edited and played back with lots of virtual users.
Install Load Tester
Download Load Tester and install it on your Windows machine if you haven’t already.  Double-click on the … Continue reading »

Load Tester No Longer uses Amazon DevPay to process Load Engine Payments

Some of our Load Tester customers have been receiving this warning email from Amazon’s DevPay:
Dear AWS DevPay Customer,
Our records indicate that you are a subscriber to the applications listed below, released through the Amazon Web Services (AWS) DevPay program:
• Web Performance, Inc.:  Load Tester load engine
We are writing to notify you that AWS will deprecate DevPay on July 31, 2017. All DevPay-based applications will be discontinued, and if your subscription is still active, it will be cancelled.  This action will not impact any other AWS offerings.
If you received this email then it only effects customers with Load Tester 5 and … Continue reading »

Real-browser support EOL

After the 6.6 release of Web Performance Tester, real-browser testcases will no longer be supported. We know that this feature is very important to some of you and we regret the difficulty this will bring. The 6.6 version will continue to support the real-browser testcases for those who have already created real-browser testcases or have purchased a license with the real-browser feature enabled. Note, however, that if Chrome is allowed to update itself on the machines running Web Performance Tester or the Web Performance Load engine, it may become incompatible with the Web Performance Tester 6.6 software. Our software requires an … Continue reading »

Support added for cloud engines in 5 more Amazon AWS EC2 regions

Load Tester now has support for the 4 newest AWS regions: Ohio, Sao Paulo, Frankfurt, Seoul and Mumbai.
Starting with the 6.6.14774 release, you will now be able to generate load from these regions using our built-in cloud engine support. You’ll need an AWS account, of course.
Unfortunately, not all of the new regions support the instance sizes that Load Tester supports:

Mumbai is missing m3.medium and c3.large
Sao Paulo is missing  m3.medium and c3.large
Ohio is missing m3.medium and t2.micro

Unfortunately, m3.medium is the size used by default in Load Tester, when starting cloud engines manually or automatically. So some care is required when using … Continue reading »

Installing Load Testing Software

Network setups and application designs vary from user to user and deciding how to implement Load Tester can be difficult. By understanding how Load Tester™ may be deployed within various environments, you’ll be able to more easily test and optimize your systems.

Upgrading repositories from 6.5 to 6.6

I’m more than a little proud that we have been able to keep our repository format backwards-compatible for the entire life of the product, with only a few minor bumps along the road. Unfortunately, that streak has come to an end. Thanks an oversight on my part in reviewing the compatibility of a 3rd-party library, some 6.5 repositories cannot be upgraded to 6.6 without some effort on your part.
TLDR: If you don’t use real-browser testcases, you get a pass – just upgrade as usual. Otherwise, before installing 6.6, open your repositories in 6.5 and delete all replays and load test … Continue reading »

Instant Load Engines Retired

Beginning with the 6.6 release, we will no longer be producing our Instant Load Engines ISOs.

Generating Load from Multiple Regions – Load Tester 6.6

Load Tester’s cloud load generation feature includes the ability to use datacenters located in different geographical regions.
This post contains detailed steps for adding an Amazon EC2 account and for running a new test configuration. These instructions apply to Web Performance Load Tester 6.6 and up. For Load Tester 6.5 and earlier, see Generating Load from Multiple Countries – Load Tester 6.5.
Why Load Test From Multiple Regions?
Generating load from different regions enables more realistic load tests. Rather than using just local datacenters, tests can simulate traffic from all over the world rather than just local datacenters.
This feature also allows testing … Continue reading »


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