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Zoompf's Web Performance Blog

How Fast Is… FIFA’s World Cup Website?

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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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SSL Performance Diary #1: The Certificate Chain

Adding support for encrypted SSL connections to a website doesn’t have to reduce the performance of your site. SSL can be properly configured so that it provides security and confidentiality, with minimal impact on the website’s page load time. In fact, SSL is a necessary step to implementing SPDY, which can actually improve the performance [...]

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5 New WPO Features

Today I am happy to announce that we have launched a new version of Zoompf WPO! We’ve added some great new features and other improvements based largely on feedback we received from our users. Here is what is new: Optimized Image Comparison As I’ve written about many times before, images are a huge part of [...]

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Apple’s Nitro JavaScript Engine Available To All Apps

Last weeks announcement that Safari would support SPDY wasn’t the only interesting piece of web performance news to come out of Apple’s WWDC 2014 event. Apple also announced that, with iOS 8, apps using the embedded web browser control, WKWebView, will gain full access to the powerful Nitro JavaScript engine. And this is a big [...]

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SPDY coming to Safari, future versions of IE

SPDY, the next generation web transport protocol, continues to gain ground and acceptance. I’ve been watching SPDY very closely and writing extensively about it for the last few years. Last year I broke the news that Facebook had adopted SPDY, ahead of other tech news sites like Wired. Zoompf has also built SPDYCheck.org, to help [...]

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Google Adds Ability for Better Performance Metrics

Last week, Google published a post entitled Understanding web pages better on Webmaster Central blog. The post discussed how the web has evolved from static HTML pages to richer content with lots of JavaScript and CSS and what this evolution means for Google’s web crawlers. But, as we will present here, Google’s post also has [...]

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Why Mozilla’s mozjpeg project is a big deal

Earlier this month, Mozilla announced a new project,mozjpeg, whose goal is “provide a production-quality JPEG encoder that improves compression while maintaining compatibility with the vast majority of deployed decoders.” In short, Mozilla is investing in creating an JPEG encoder that will create smaller JPEGs without sacrificing visual quality. These smaller images will just work with [...]

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Taming the Third Party Web Performance Beast

Every day we talk to great web companies across the world and hear the same refrain over and over: “I can’t fix that problem because it’s caused by a third party content provider and (insert evil department here) won’t let us remove it”. Third party content is loosely defined as any content included by your [...]

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Improve Your Conversion Rates with Optimized Product Images

The following post was originally guest posted by Zoompf on the ChannelAdvisor ecommerce blog. For the e-commerce retailer, high quality images are critical to a positive buying experience. Rich, clear imagery can often make or break a successful sale. Of course as with everything in life, this comes at a cost. Did you know that [...]

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Step-by-step Guide to Optimizing your Apache site with mod_pagespeed

If you host your own website running Apache and are not already checking out mod_pagespeed, you really should. ¬†Created by Google, mod_pagespeed is “an open-source Apache module which automatically applies web performance best practices to pages, and associated assets (CSS, JavaScript, images) without requiring that you modify your existing content or workflow.” While there are [...]

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