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Performance Budgets
(how to get your website to lose weight)
Damien Jubeau - CEO English Transcription
blog.dareboost.com/wls
The average webpage is now the
size of the original Doom
2.39MB - 2016, Ronan Cremin from HTTP Archive data
“ We’ve remade the Internet in our
image…. obese. “
Jason Grigsby
Organizational
Financial constraints
Revenue model
Artistic direction
Political management
Operational
Software entropy /
technical debt
Lack of skills
Traffic overload
Network Issues
3rd-party QoS
“ Speed is product feature number
one ”
Larry Page
Using a performance
budget
“Our website must be very fast”
“Pages should be less than 1MB”
“Speed Index should be less than 2000
using a mobile over 3G”
How to use a performance
budget?
Budget: 1MB
Current weight: 800kB
Budget: 1MB
Current weight: 800kB
Evolution : 400kB 1.20 MB
Optimize.
Budget: 1MB
Current weight: 800kB
Evolution : 150kB 0.95 MB
Budget: 1MB
Current weight: 800kB
Evolution : 300kB 1.10 MB
Clean.
Budget: 1MB
Current weight: 650kB
Evolution : 300kB 0.95 MB
Failing to comply with a budget?
Question the value, again!
Forget about the new feature?
Move forward and adjust the
budget
How to choose a budget?
If you can't measure it, you can't
improve it
Not all the pages are equal
Not all your pages are equal
Catching up or surpassing the
competition
Experiment: how much does a
slowdown cost us?
Make a new version
significantly faster
Steven Seow, 20% rule (Weber’s law)
Some budgets are derived from
external constraints
Google Crawl Budget
14kB for the critical rendering path
Performance Culture: gain
support for the budgets
Speed is the #1 feature
Anticipate performance issues
Question the value
Optimize the old and the new
Thanks!
Sources
http://bradfrost.com/blog/post/performance-as-design/
https://timkadlec.com/2013/01/setting-a-performance-budget/
https://timkadlec.com/2014/01/fast-enough/
https://suits-sandals.com/index.php?p=blog/setting-a-web-performance-budget-where-to-start
https://medium.com/@DamienJubeau/budget-de-performance-indispensable-rapidite-sites-web-a771
922e89e8
https://developers.google.com/speed/docs/insights/mobile
https://www.thinkwithgoogle.com/marketing-resources/the-google-gospel-of-speed-urs-hoelzle/
http://blog.chriszacharias.com/page-weight-matters
https://uberdev.wordpress.com/2009/08/13/summary-of-designing-and-engineering-time-by-steven-c-
seow-ph-d/
https://www.wired.com/2016/04/average-webpage-now-size-original-doom/
https://www.poynter.org/news/text-only-news-sites-are-slowly-making-comeback-heres-why

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Budgets de performance