Ragnar Lönn

Ragnar is the founder and head of product development at Load Impact
Find me on:

Recent Posts

Building a UI for the k6 load testing tool

This article describes how to build an external command-and-control UI for exploratory load testing with k6. The UI is written in Python and features some awesome ASCII graphics using the Python curses library.

Read More

Performance Testing in the Cloud, a Deeper Dive

As discussed in the earlier blog on Performance Testing in the Cloud, performance testing tools must fit into today's DevOps workflows. This means that they should support both local testing and cloud based testing. Local testing for developers, early in the dev cycle, and cloud based testing later in the cycle for running larger tests.

Let's take a deeper dive into the cloud based testing scenario. 

Read More

How to control a live k6 test, with these built-in commands

This article takes a look at the k6 pause/resume/scale/stats/status commands, and how to use them to control and query a remote k6 instance running a test. This can be useful when you want to dynamically control a load test at runtime, pausing it or modifying the number of virtual users.

Read More

k6 Update 2017

A good year!

Just now we released k6 version 0.18, which includes substantial changes from 0.17. I wanted to tell you a bit about those, and also look back at what has happened in the project during 2017.

Read More

How to do 10 things in Jmeter vs k6

 

 

We recently released k6, the new load testing tool written in Go and scriptable in Javascript. It has seen a phenomenal reception (over 3,000 stars on Github already!) but there isn’t yet much about k6 on Stackoverflow (please do ask some questions there, if you have any!)

Read More

Comparing load testing tools

Are you on the lookout for a load testing tool, but fear the time investment you’re going to have to make to install, configure and then evaluate a bunch of different tools?

Read More

The state of load testing

(Warning to readers: this article is long and rambling, like most articles by the same author)

Once upon a time, I wrote a very simple command-line load testing tool in C. I called it "myload", partly because it was written by, well...myself, and partly as an allusion to MySQL (this was back in the days when MySQL ruled and I had yet to start using PostgreSQL).

Read More

Open Source Load Testing Tool Benchmarks V2

 
Earlier this year, we wrote a couple of articles reviewing the functionality, usability (link to review article) and performance (link to benchmark article) of a bunch of open-source load testing tools. Si nce then, we have uncovered our own open-source load testing tool - k6 - and it would seem it is time for an update to our reviews and benchmarks, so that we both include k6 but a lso test newer versions of the other tools out there.
 
So, here are the NEW AND UPDATED op en source load testing tool benchmarks!
Read More

Creating k6 - a developer-centric load testing tool

How we created k6 - the engineering story.

Read More

An... other load testing tool?

As some may already know, Load Impact recently let loose upon the world yet another load testing tool - k6

Read More

Recent Posts

Popular posts

Posts by Topic

see all

Subscribe to Email Updates