Category Archives: Web Performance

29 Jan 2026

curl CDN diagnostics: HTTP headers, caching, TLS timing

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Comprehensive Diagnostic Methodologies for Global Content Delivery Networks via the curl Command-Line Utility Modern CDNs hide enormous complexity behind clean, fast responses. Anycast routing, TLS termination, cache layers and security policies can all fail in subtle ways. In this article we focus on using curl as a transparent, protocol-level diagnostic tool that lets engineers at CDNsun customers and beyond observe, test and optimize end-to-end CDN delivery with surgical precision. Transparent HTTP/S Diagnostics for CDN Routing and Caching At the heart of CDN [...]

26 Jan 2026

How TLD DNS latency shapes CDN TTFB and Core Web Vitals

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The DNS performance of top level domains is a hidden but decisive factor in global content delivery. Before any CDN edge or web server can respond, resolvers must traverse the DNS hierarchy and contact TLD nameservers. In this article we examine how modern TLD infrastructure, latency profiles and security features affect Time to First Byte and how to choose TLDs that support, not limit, your web performance strategy. Top level domain latency as a performance lever The DNS lookup path to [...]

27 Dec 2020

The Unexpected Business Benefits of Using a CDN

Chris

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Unexpected business benefits of using a CDN are the indirect advantages one gains from the performance provided by a Content Delivery Network platform. Page load speeds, application performance, and a great user experience have always been vital components in any online strategy. However, as the world continues to embrace digital solutions, focusing on these requirements is now more critical than ever. As almost every aspect of our daily lives starts or ends with an online service, organizations that operate [...]

18 Oct 2020

Google Lighthouse – Create Better Web Pages

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Google Lighthouse is an automated tool built to aid developers in creating better web pages. It is free, open-source, and embedded in Chrome with the rest of the Developer Tools. Lighthouse gives you the capability to audit web fundamentals such as performance, progressive web app review, general best practices, accessibility, and Search Engine Optimization (SEO). Written in JavaScript, you can run it against any web page, and even measure site pages that require authentication. In addition to the embedded version that [...]

29 Sep 2020

Core Web Vitals: How Google Will Rank your Site in 2021

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Core Web Vitals are metrics that focus on the user experience as a webpage renders in a user's browser. Historically, Google's Page Rank algorithm concentrated on overall page load speed and mobile-friendliness. However, a recent blog post from the search engine giant stated that people prefer sites that deliver a superior page experience. Their research determined that a modern web user demands a responsive, visually stable, and fast service. Subsequently, Google announced that these factors would play a vital role in [...]

07 Sep 2020

Performance Metrics – What to use and when

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Performance metrics are a set of tools that you can leverage to ensure your site delivers the best user experience possible. As everything we do these days requires an online interaction, be it a search for a specific item or listening to your favorite song, the digital services we interact with have become an integral part of our daily lives. Creating a first-rate user experience in this competitive market is vital, and developers need to factor this narrative into [...]

11 Aug 2020

Front-End Optimization – A Checklist for Performance

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Front-End Optimization is a complex task in any web development project. As the migration to digital platforms continues to grow exponentially, rapid performance with pages that load within a few seconds is vital. However, optimizing your front-end technologies is not a simple task as it involves the orchestration of several fundamental variables. Site assets that load in real-time, such as JavaScript, fonts, and images, directly influence page load speeds. Encryption, API calls, and the location of your origin server also [...]

26 Apr 2020

Testing the Performance of Your Website – The Correct Way

Testing the performance of your website is vital. As the world continues to embrace digital services to meet their commercial needs, ensuring your site loads rapidly and efficiently is crucial in delivering the experience modern users demand from any online interaction. Not only does a fine-tuned, fast loading website enhance the relationship you build with your visitors and customers, but it is also crucial in obtaining desirable Search Engine Optimization (SEO) rankings. A poor performing website is not only punished [...]

17 Mar 2020

Page Load Speed – Tuning for Optimum Performance

Page load speed is a vital metric for any site operator competing in the online market. As the world has embraced the digital realm, almost every commercial transaction in developed economies begins with an Internet search. Page load speed not only determines how high your site ranks on a search engine's landing page, but it also has a direct relation to another crucial website metric - your bounce rate. Research conducted by Google proves there is overwhelming evidence indicating [...]

08 Dec 2019

SD-WAN or CDN – Do You Need Both?

A CDN or SD-WAN both deliver functionality that improves the performance of web-based applications and services. As the digital age continues to transform the way we transact, communicate, and consume information, online apps and solutions are vital utilities needed to navigate the information economy. However, seamless access to these platforms is not enough. Service providers need to ensure their solutions are resilient and deliver the performance expected by today's modern technology user. The Anatomy of an SD-WAN According to Gartner, a Software-Defined Wide Area Network (SD-WAN) has four characteristics: It must support [...]