In this post I’m going to briefly cover the D3 reusable component pattern, integrating these components into an Angular app and the advantages to doing so. Then we’ll go into testing these visual components using the Karma test runner.… Read More »
In this blog post we’re going to compare the parsing and serialization efficiency of three different C++ JSON libraries. We are carrying out this performance test because we use JSON-RPC in some of our applications. … Read More »
Installing ThousandEyes private agents in each branch location gives you more accurate data about the performance of your network infrastructure, as well as web-based SaaS applications that depend on that infrastructure. To get you up and running quickly we’re supplying modules for the most popular configuration management tools. Today we’re releasing a teagent Chef cookbook to help you install and configure the ThousandEyes private agent with Chef.
… Read More »
In Part 1, I converted a widget from a jQuery plugin into an AngularJS directive. Here, I talk about how to write an extensible widget through using Directive Controllers, a feature in AngularJS directives.… Read More »
Whether you’re developing websites or web applications, you’ve probably encountered the need for some form of interactive controls that don’t come out of the box from the browser. The date picker is a classic example of such functionality. In many cases, the interactivity can be generalized and packaged into reusable components which I’ll call widgets.… Read More »
Here at ThousandEyes, we’re big on solving problems. We aim to give people the data and tools they need to quickly identify performance problems with their websites or network assets. One test we offer our customers is an “HTTP Server” test — we request a URL provided by the client and time each step of the process using cURL. In the “normal” case, when a client is talking directly to a webserver, measuring these values is fairly straightforward. Unfortunately, some clients sit behind proxies and cannot talk directly with the webservers they wish to monitor. … Read More »
ThousandEyes agents can help you understand and troubleshoot what’s happening with your network and infrastructure, giving you visibility from the inside and allowing you to go all the way to the cloud provider. Installing the ThousandEyes private agent is a simple process; the installation script is very easy to use and you will have a private agent online within a few minutes, but manually installing software, no matter how easy it is to install, on multiple servers is ancient history.… Read More »
I would say that RESTful APIs have become the de facto standard for APIs on the web, except that I can’t, because REST is not a standard. It’s a set of design principles created by Roy Fielding as part of his Ph.D. dissertation. As a result, there is much discussion (and confusion) out there on the web about how to apply these principles in practice.… Read More »
When manually diagnosing network performance issues, there are several techniques that can rely on ICMP probing, e.g. measuring round trip time, measuring end-to-end loss, tracerouting, etc. In this article we will show that ICMP introduces some bias in these measurements, and that by using TCP-based probing we are able to overcome most of the limitations of ICMP.… Read More »
Iperf was originally developed by NLANR/DAST as a tool to measure maximum TCP and UDP bandwidth performance. In most cases the results reported by Iperf are close to the real available bandwidth, however the results of the test can’t always be taken at face value… Read More »