Instant Website Tests with BrowserMob

Can you afford a slow landing page?

Google AdWords page quality criteria are many, a prominent check being your landing page load time. A slow load time can lead to a lower quality score.

Make sure you’re not wasting effort on advertising campaigns. Altentee uses BrowserMob to help check website performance for clients from multiple locations. You [...]

My Favourite SCiTE settings …

Well the subject goes without saying. I’ve been working on WinXP again lately and when I’m not around my favourite text editor on the mac (TextMate) I opt for SCiTE on windows. The following settings I find useful for this simple but powerful text editor. YMMV.

Why Load Testing Does Not Work for the Web `Date::today >> 36`

I was going to write why LoadRunner does not work for the web as it is today and into the foreseeable future, but decided against that because I don’t think the following points are necessarily limited to a specific toolset.

Load testing does not work for web as it is today primarily because…

Vim Cheat Sheets on a Mug

I’ve been thinking about some promotional material for the company I work for. What inspired me was seeing a vi coffee mug… Unfortunately only available in the US. I’ve been endeavouring to wean myself off textmate and the like so thought this was a brilliant idea. But with limited space, what essential commands should go [...]

Sparklines

“Sparklines: Intense, Simple, Word-Sized Graphics”

If you’ve been reading this blog for sometime, you will know I’ve got a certain penchant for sparklines, a term coined by Edward Tufte and referred to in his book titled “Beautiful Evidence”

True sparklines are meant to be word-like graphics, such that they fit inline with the body of the text, [...]

Gantt Charts in Open Office

This might help you out when analyzing time series data.

In this particular situation I’m looking at a bunch of SOA web services that get called synchronously in the backend infrastructure. The logs have entries with a unix timestamp, service description and duration. What I want to do is view the data in a Gantt Chart [...]

Microsoft Log Parser to the Rescue

I hate to say it… but Microsoft really have produced an excellent tool for sysadmins and performance testers alike. That tool is called LogParser. I’ve mentioned it before but that was more IIS specific. LogParser can be pointed at just about any type of log file. So with a bit of Perl (or equivalent) to [...]

Data Driven AutoIt Scripts

I’ve recently been playing around with AutoIt in an effort to steer clear of QTP and the like. AutoIt is a simple but effective way in which to automate pretty much any Windows GUI application. To that end I needed a simple data driven framework to include in the script. AutoIt comes with some handy [...]

Establishing Concurrency from your Web Logs

I recently had a conversation with a colleague about how one might determine the concurrency for a given page or transaction at any point in time. The system under test was a typical web server and we had access to the web logs for analysis.

That is, we wanted to know how many virtual users were [...]

Performance Testing with Apdex

Often when performance testing in a black box environment, you are left with the onerous responsibility to report against response time performance.

A typical approach by performance testers is to rely on 95th percentiles, which is effectively a Service Level Agreement (SLA) saying that 95 percent of all my samples have a response time below 5 [...]