Remove bandwidth-is-infinite
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The HTTP/1-liness of HTTP/2

CSS Wizardry

One of the promises of H/2 was infinite parallel requests (up from the historical six concurrent connections in H/1). Of course, a late-discovered file will also be late-useful, but really the only thing that matters is usefulness. We’re still limited by device and network constraints. Let’s unpack it! Fifty-two seconds.

Games 130
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Fallacy #3: Bandwidth is infinite

Particular Software

The availability of bandwidth increases at a staggering rate, but we're never happy. But although bandwidth keeps growing, the amount of data and our need for it grows faster. When transferring lots of data in a given period of time, network congestion can easily occur and affect the absolute speed at which we're able to download.

Latency 40
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Quality Begins Where the User Journey Ends

Apica

Indeed, there was a time when applications were vertical stacks of software atop networks and servers wholly owned by the company. In today’s distributed cloud application environments, no matter how many front-end tests an organization runs, there are still infinite ways something could go wrong in front of users.

Retail 52
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The Performance Inequality Gap, 2024

Alex Russell

It's time once again to update our priors regarding the global device and network situation. seconds on the target device and network profile, consuming 120KiB of critical path resources to become interactive, only 8KiB of which is script. What's changed since last year? Going forward, I'll produce both as top-line guidance.

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The Performance Inequality Gap, 2021

Alex Russell

Thanks to progress in networks and browsers (but not devices), a more generous global budget cap has emerged for sites constructed the "modern" way: ~100KiB of HTML/CSS/fonts and ~300-350KiB of JS (compressed) is the new rule-of-thumb limit for at least the next year or two. Live by the link, die by the link.

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Front-End Performance Checklist 2021

Smashing Magazine

Below you’ll find a (hopefully unbiased and objective) front-end performance checklist for 2021 — an updated overview of the issues you might need to consider to ensure that your response times are fast, user interaction is smooth and your sites don’t drain user’s bandwidth. Get a free trial of LogRocket today. Table Of Contents.

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Front-End Performance Checklist 2020 [PDF, Apple Pages, MS Word]

Smashing Magazine

Below you’ll find a (hopefully unbiased and objective) front-end performance checklist for 2020 — an updated overview of the issues you might need to consider to ensure that your response times are fast, user interaction is smooth and your sites don’t drain user’s bandwidth. Vitaly Friedman. 2020-01-06T10:30:13+00:00. Table Of Contents.