Load Testing Blog
New JavaScript optimizer
From a load testing perspective, we are not generally concerned with Javascript performance – since it affects client-side rendering time and therefore has little relationship to load. However, we do see a lot of sites that could benefit greatly from improved Javascript performance – especially reducing the size of their Javascript files. Google has a relatively new project, Closure Compiler, that optimizes JavaScript code to reduce size and improve performance.
If you’ve tried the Closure Compiler, give us a shout. We’d love to hear about your results!
Chris
Chief Engineer
How-To: Dynamic Field Names and Multi-Variable Extractors
Overview
You’re recording test cases, configuring them, replaying them, and running load tests. One day, you attempt to test a new web application. However, every time you attempt to run a replay, the replay throws an extractor error; it is unable to find a field in the page content of the replay to extract. ASM configured this field automatically, so why isn’t it working? You look at the replay content … and the field name isn’t there.
The usual culprit that causes this problem is a dynamic field name: a variable in a dynamic web page that not only changes in value, … Continue reading »
Performance Impacts of AJAX Development
Using AJAX to Improve the Bandwidth Performance of Web Applications
Being a performance company, we are always interested in the impact of new development techniques on the performance of web applications. We have numerous customers who have performance problems due primarily to the size of their web pages. Put another way – the pages are simply too big to achieve the desired performance goals with the available bandwidth. In some cases, the page consists primarily of content that is common between many pages. For instance, a header, footer and navigation menu that change infrequently, if at all, during the use of … Continue reading »
