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Cache and Prizes

Alex Russell

Browsers will cache tools popular among vocal, leading-edge developers. There's plenty of space for caching most popular frameworks. The best available proxy data also suggests that shared caches would have a minimal positive effect on performance. Browsers now understand the classic shared HTTP cache behaviour as a privacy bug.

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The Performance Inequality Gap, 2023

Alex Russell

TL;DR : To serve users at the 75 th percentile ( P75 ) of devices and networks, we can now afford ~150KiB of HTML/CSS/fonts and ~300-350KiB of JavaScript (gzipped). This is a slight improvement on last year's budgets , thanks to device and network improvements. That is, what was the average device in 2016?

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Fixing a slow site iteratively

CSS - Tricks

The code for the site is available on GitHub for reference. Using a network request inspector, I’m going to see if there’s anything we can remove via the Network panel in DevTools. I like using Fiddler , and when I inspect the network requests I see that there are indeed some old URLs and redirects floating around.

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Percentiles don’t work: Analyzing the distribution of response times for web services

Adrian Cockcroft

I presented this analysis of response time distributions talk in 2016 — at Microxchg in Berlin ( video ). The code is written using the R statistics language and I downloaded a free copy of RStudio to run the examples below. > I’ve been thinking about this for a long time. of the largest peak, the ones that are visible in the plot.

Lambda 98
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Average Page Load Time in 2021

MachMetrics

from wpostats, 2016 ). Now imagine if the previous test were conducted with a stable connection and you still have to test it with a 3G connection as many users still having to use a relatively slower network. Once you have configured the cache settings properly here comes the help of server response time and TTFB (Time To First Byte).

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Can You Afford It?: Real-world Web Performance Budgets

Alex Russell

We constrain ourselves to a real-world baseline device + network configuration to measure progress. Budgets are scaled to a benchmark network & device. JavaScript is the single most expensive part of any page in ways that are a function of both network capacity and device speed. Execute the script. Global Ground-Truth.

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How Improving Website Performance Can Help Save The Planet

Smashing Magazine

This includes the work done by the server, the client and the intermediary communications networks that transmit data between the two. All of the major browsers provide developer tools that allow us to measure network activity. In 2016, O’Reilly published “ Designing For Sustainability ” by Tim Frick. Large preview ).