Blog reboot
I’m redesigning my blog. I plan to use this space to document my research in the field of web performance. More content will follow soon.
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CSS minification: an empirical study based on the July 1, 2011 HTTP Archive
One of the many common recommendations for accelerating the download of web pages is to minify JavaScript and CSS content. Among content optimization practices, minification is a safe bet: it never...
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JavaScript minification: an empirical study based on the July 1, 2011 HTTP...
Using the same methodology as in my earlier study of CSS minification, I tested 102,577 JavaScript URLs from the July 1, 2011 HTTP Archive release to determine how much the application of JavaScript...
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The opportunity for web image optimization: an empirical study based on the...
Following my investigations of CSS and JavaScript minification, I applied a similar test methodology to study whether further image optimization could materially accelerate the page loading of a large...
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Will HTTP pipelining help? A study based on the HTTPArchive.org data set
1. Background 1.1 Serialization of HTTP requests One reason why web pages download slowly is that most browsers implement HTTP requests serially on each persistent connection: Open a connection to a...
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A hole in the waterfall: observations on JavaScript delays
Many web performance analysis tools use waterfall charts to show the timing of HTTP requests within a page download. Here is an example from the HTTP Archive showing the first two dozen requests that...
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Measurements of client-side processing delays
Recently I wrote about “holes in the waterfall“: gaps in the waterfall graph for a web page download where no network activity occurred while the browser processed some JavaScript. To measure how...
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