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Zoompf's Web Performance Blog

SSL Performance Diary #2: HTTP Strict Transport Security

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This post part of a series, where I discuss the steps I am taking to implement SSL on a website while simultaneously improving its performance. I previously discussed optimized SSL certificates. Today I’ll discuss a super easy SSL performance optimization that everyone should be doing: HTTP Strict Transport Security. When we were designing the web [...]

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Speed Up Your Bootstrap and Font-Awesome Sites Using Font Compression

Twitter Bootstrap and it’s frequent add-on Font-Awesome have gained tremendous popularity in recent years due to the relative ease these libraries provide for building good looking, responsive websites. So much so that here at Zoompf we’ve seen the same performance problem appear again and again: uncompressed font files. Of course, uncompressed font files are not [...]

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Announcing the Zoompf Alerts Beta!

Today we are ecstatic to announce the public beta launch of Zoompf Alerts! Zoompf Alerts is a new website performance solution that continuously scans your web pages for changes that introduce new performance defects. Unlike traditional performance monitoring solutions, Zoompf Alerts does not focus on measuring page load times. Instead, Zoompf Alerts detects when actual [...]

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How Fast Is… FIFA’s World Cup 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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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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