Spade shape with cobalt blue background

Performance Newsletter

Archives
Calibre Monitoring
Free Speed Tools
Log in
Subscribe
13 December 2023

⚡ 141: Digital divide and web performance

͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏
 
Performance Newsletter
[issue 141]()
 
#### Editor’s note
 
I’ve been banging this drum for a long time, and I’ll keep going: equitable access to the internet—the information, opportunities, and tools it brings, is a human right. While for many in the Wealthy West, the internet has been ubiquitous, large amounts of the Earth’s population still either don’t have access or their access is severely limited.
 
A couple of resources in this issue cover equitable access: from bridging the digital divide to measuring CPU capabilities per region. While my 30 GB plan costs $23 per month, in Saint Helena, 1 GB of mobile data sets a person back by $41. We can’t say that devices are “fast enough” and data is “cheap enough” for everyone to equally benefit from what the internet brings because it’s simply not true. Our work is not done until anyone, no matter their location, device, network, data plan, socioeconomic situation, can have the freedom to access the internet whenever they want or need to.
 
This is the last issue of the Performance Newsletter for this year. We hope you found it helpful and look forward to 2024. Have a restful end of the year!
 
Karolina
 
 
 
 
#### What’s Performance newsletter?
 

Performance Newsletter is a fortnightly mailing by [Calibre](https://calibreapp.com), featuring web performance tools, talks and resources.

Don’t worry—we don’t spam. If you’d like to leave, [unsubscribe]() at any time. Suggest content [here. ](mailto:[email protected])

 
 
 
# Articles  
 
Network tab showing custom server timings
 
### [Super helpful: Server-timing HTTP response headers](https://tbeseda.com/blog/super-helpful-server-timing-http-response-headers)
 
[Taylor Beseda](https://tbeseda.com/)
Web servers can include the server timing HTTP response header with arbitrary server timing metrics. Find out how to collect and display custom timings.
 
### [Why web perf tools should be reporting website carbon emissions](https://calendar.perfplanet.com/2023/why-web-perf-tools-should-be-reporting-website-carbon-emissions/)
 
[Fershad Irani](https://fershad.com/)
Understand the current landscape of website carbon emission monitoring—what tools are available, their benefits and shortcomings, as well as why we should be looking at emission data right now.
 
### [Testing the performance of social media embeds](https://css-irl.info/testing-the-performance-of-social-media-embeds/)
 
[Michelle Barker](https://michellebarker.co.uk/)
Embedding third-party widgets comes at a substantial cost. Check why YouTube embeds are so heavy, and compare to other, popular social media embeds.
 
 
 
# Case Studies  
 
CPU benchmarks for South Afric mobile with P75 366ms mean
 
### [Wikipedia’s worldwide web: CPU benchmark](https://calendar.perfplanet.com/2023/wikipedias-worldwide-web-cpu-benchmark/)
 
[Peter Hedenskog](https://www.peterhedenskog.com/)
Wikipedia started tracking CPU Benchmark as a custom metric to ensure they were delivering on their mission. Find out how vastly CPU speeds differ based on location, based on real visitor data.
 
 
 
# Courses, Talks & Podcasts  
 
Cost of 1GB of mobile data on a bar chart with Saint Helena at $41.06 at the top
 
### [Bridging the digital divide using web performance](https://talks.nooshu.com/N86m1L/bridging-the-digital-divide-using-web-performance)
 
[Matt Hobbs](https://nooshu.com/)
Equal access to information and opportunities is a human right. Learn how web performance is one of the critical tools to achieve equity online.
 
Chrome Developer Tools Application tab back/forward cache is in use
 
### [Debugging bfcache, make your page load instantly](https://www.youtube.com/watch?v=Y2IVv5KnrmI&ab_channel=ChromeforDevelopers)
 

[Jecelyn Yeen](https://jec.fish/) & [Barry Pollard](https://www.tunetheweb.com/)

Bfcache can make navigating between pages near-instant. Learn how to optimise your site for the bfcache, and how to debug potential blocking issues.

 
 
Calibre
 
This email is brought to you by the team at [Calibre](https://calibreapp.com). We automate web performance testing, reporting and alerting, so you don’t have to.
 
 

Performance Newsletter is sent from the traditional lands of the Wurundjeri people of the Kulin nation. We acknowledge that sovereignty was never ceded and pay respects to the Elders past and present.

Send your suggestions, links and feedback to [[email protected]](mailto:[email protected]).

[View or share this email →]()
[Quickly unsubscribe →]()
[Browse older issues →]()

**Sent by**
Calibre Analytics

V119 / 425 Smith Street
Ngár-go
Fitzroy VIC 3065
Australia

 
Don't miss what's next. Subscribe to Performance Newsletter:
← Newer ⚡ 142: How to analyse a Chrome trace Older → ⚡ 140: How people perceive speed
perf.email
Bluesky
LinkedIn