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Zoompf's Web Performance Blog

5 Common Causes of Slow Website Performance

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One of the benefits of working in the website performance industry is the treasure trove of interesting data just sitting out there in the public domain. Over the last few days we aimed our website performance scanner at the Alexa Top 1000 websites to gather various performance metrics of interest. In this post we’d like [...]

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Improving Performance by Replacing British with American English

At Zoompf, we are always focused on bringing you the best guidance on how to optimize your website for faster frontend performance. In the past, we promoted optimizations such as lossy image optimizations or better GZIP support long before they became common place. In Zoompf’s role as a web performance visionary discovering new methods to [...]

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Facebook Adds SPDY Support!

Facebook has quietly enabled support for SPDY, the super charged HTTP replacement from Google that is serving as the basis for HTTP/2.0. This is a huge leap forward for web performance and the adoption of newer, better protocols to transmit web content. Wider adoption of SPDY means that the need for web performance hacks like [...]

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The Many Kinds of SPOF

If there is one good thing about disasters it is that they tend to raise awareness and increase preparedness. For example, if I hear about a house fire, I always go and check the batteries in my smoke detectors. If a bad storm hits somewhere, I always go and test the flashlights in the house [...]

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Performance Implications of Opera’s Switch to WebKit

Opera recently announced that it was dropping its Presto layout engine and Carakan JavaScript engine and adopting WebKit and V8. Actually, Opera announced they were going to develop “[products] built using the open-source Chromium browser” of which WebKit and V8 are the most visible and well known components. This is a pretty amazing shift and [...]

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How Fast Is… The Windows 8 Launch Website?

Our regular video series How Fast Is…? examines real world websites and details the cause of their performances issues as well as what should be done to solve them. After all, the best way to learn about front-end web performance is to see what other people are doing right and doing wrong. In this edition [...]

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How Fast Is… Apple.com?

Our regular video series How Fast Is…? examines real world websites and details the cause of their performances issues as well as what should be done to solve them. After all, the best way to learn about front-end web performance is to see what other people are doing right and doing wrong. In this edition [...]

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Announcing SPDYCheck: The SPDY Lint Tool

Steam seems to be building up behind SPDY, the next generation web transportation protocol. I wrote back in June that the majority of web browsers speak SPDY, and the majority of web servers are capable of speaking SPDY. Last week, the IETF rechartered the HTTP Working Group to develop HTTP/2.0 based on SPDY. While the [...]

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Internet Explorer is the Hare. And That’s Bad

Internet Explorer 10 is nearly upon us. This is the first update to IE in 19 months. This is a drastically different approach to updating browsers than, say, Google Chrome. I thought it would be interesting to compare the different strategies Microsoft and Google use to deliver web browser innovation. To do that, we need [...]

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Explaining the CRIME weakness in SPDY and SSL

There is an interesting new security weakness discovered in SPDY and SSL/TLS that allows attackers to decrypt the session cookies for other websites. This weakness, known as CRIME, was discovered by Juliano Rizzo and Thai Duong. They will present their full findings at the Ekoparty Security Conference in Buenos Aires later this month. Since SPDY [...]

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