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Zoompf's Web Performance Blog

I Doubled the Speed of Our Product with Multiple Row Inserts

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This is the story about how I discovered something stupid that I did with our database. Fixing this mistake made our performance scanner twice as fast and dropped our database query count by 2/3! This is a huge win for our customers who can now get performance findings 2x quicker. And while I’m a little […]

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SPDY is Dead. Long Live HTTP/2!

Earlier this week Google announced that they will deprecate support for SPDY and transition to HTTP/2. As we have discussed before, SPDY was Google's experiment in making the web faster by improving the way your browser communicates with websites. SPDY formed the basis for HTTP/2 and has been largely replaced by it. With HTTP/2 is […]

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Detected and Optimizing Mismatched Image Formats

Serving the wrong image type can really hurt web performance. An improperly saved image can waste bandwidth and delay the page load time. In this blog post, I’ll show how you can use the file and grep commands to quickly, easily, and automatically find mismatched images that look like one image type but are actually […]

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HTTP/2: A Fast, Secure Bedrock for the Future of SEO

In prior articles we've written extensively about website performance and securing your website, both factors Google has publicly announced as search ranking factors. These articles provide extensive tips using existing tools and technologies to improve your site performance and security (tips we highly recommend you follow). But did you know Google also developed and is […]

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SSL Performance Diary #4: Optimizing the TLS Handshake

In our prior SSL Performance Diary post, Optimizing Data Encryption, we mentioned there are 2 areas of TLS that can harbor performance problems: Encrypting the data. Data sent back and forth between visiting web browsers and your web server must be encrypted and decrypted. If not configured properly, your page load times can become much […]

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SSL/TLS Performance Diary #3: Optimizing Data Encryption

This post is one in a series of posts about properly implementing SSL/TLS. This post is excerpt from our recent Moz article, Enabling HTTPS Without Sacrificing Your Web Performance. We’ll cover additional topics from this article in future posts to our SSL Diary. In previous SSL/TLS diary posts, we discussed optimizing the certificate chain, as […]

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Connect-JS Talk: Optimizing Front-end Web performance like a rockstar

I recently spoke at Connect-JS, an awesome JavaScript conference held in Atlanta. They had an incredible line up of speakers and I was honored to be apart of their inaugural year. There was a large turn out, and while less intimate than smaller conferences I've spoken at like JSConf, Connect-JS was a lot of fun […]

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Content Detection: A wretched hive of scum and villainy

A few days ago, I wrote about how the BBC was serving a BMP image as a JPEG. Several people have asked me why would this even work at all? The file extension and the MIME Type both implied it was a JPEG, but the file wasn’t a JPEG. How could the browser even render […]

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From Performance Issue to Bug to 3 New Features

“It has to be a bug” I thought. “This makes absolutely no sense!” We were about to go live with a major new product, and I had just found what looked like a show-stopping bug. But it wasn’t a bug. In fact, it was something so odd and cool, I ended up creating 3 new […]

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Visualizing image optimizations with hex editors and strings

I’m a big fan of image optimizations, and have written several posts about it. Images dominate the web in terms of both byte size and request count. Luckily, they are super easy to optimize with free and/or open source tools. For lossless image optimization, you can expect to consistently reduce the size of your image […]

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