61. #SMX #XXA @bart_goralewicz
Source: https://medium.com/dev-channel/the-cost-of-javascript-84009f51e99e
Addy Osmani
engineering
manager
at Google working
on Chrome.
9s
78. #SMX #XXA @bart_goralewicz
With performance it isn’t about 1 metric only.
• First Contentful paint
• Onload
• DOM content loaded
Also: e.g. time to interactive
79. #SMX #XXA @bart_goralewicz
2 key metrics according to
1. First Contentful Paint
2. DOM content loaded
https://ele.ph/wtf
98. #SMX #XXA @bart_goralewicz
A new game & new rules
User devices
CPU performance
CDN
Network speed (2G – 5G)
First paint vs. Loaded vs. EIL etc.
% of returning users vs. new users vs. performance
Safari vs. Chrome
99. #SMX #XXA @bart_goralewicz
Outro:
JavaScript is great but just like sugar, coffee,
booze & drugs. Use it wisely.
If you want to rock @ Mobile First SEO, get familiar
with JavaScript SEO
BigQuery & Chrome User Experience Report is your
friend (even though it plays hard to get)
JavaScript is
great but just like
sugar, coffee,
booze & drugs -
use it wisely.
If you want to
rock @ Mobile First
SEO, get familiar
with JavaScript
SEO
BigQuery & the Chrome
User Experience Report
is your friend (even
though it plays hard to
get)
OUTRO