Webmaster Central Blog
Official news on crawling and indexing sites for the Google index
Making smartphone sites load fast
Thursday, August 08, 2013
Webmaster level: Intermediate
Users
tell us
they use smartphones to search online because it’s quick and convenient, but today’s average mobile page typically
takes more than 7 seconds to load
. Wouldn’t it be great if mobile pages loaded in under one second? Today we’re announcing new
guidelines
and an updated
PageSpeed Insights tool
to help webmasters optimize their mobile pages for best rendering performance.
Prioritizing above-the-fold content
Research
shows
that users’ flow is interrupted if pages take longer than one second to load. To deliver the best experience and keep the visitor engaged, our guidelines focus on rendering some content, known as the above-the-fold content, to users in one second (or less!) while the rest of the page continues to load and render in the background. The above-the-fold HTML, CSS, and JS is known as the
critical rendering path
.
We can achieve sub-second rendering of the above-the-fold content on mobile networks by applying the following best practices:
Server must render the response (< 200 ms)
Number of redirects should be minimized
Number of roundtrips to first render should be minimized
Avoid external blocking JavaScript and CSS in above-the-fold content
Reserve time for browser layout and rendering (200 ms)
Optimize JavaScript execution and rendering time
These are explained in more details in the
mobile-specific help pages
, and, when you’re ready, you can test your pages and the improvements you make using the
PageSpeed Insights
tool.
As always, if you have any questions or feedback, please post in our
discussion group
.
Posted by
Bryan McQuade
, Software Engineer, and Pierre Far, Webmaster Trends Analyst
Hey!
Check here if your site is mobile-friendly.
Labels
accessibility
10
advanced
195
AMP
13
Android
2
API
7
apps
7
autocomplete
2
beginner
173
CAPTCHA
1
Chrome
2
cms
1
crawling and indexing
158
encryption
3
events
51
feedback and communication
83
forums
5
general tips
90
geotargeting
1
Google Assistant
3
Google I/O
3
Google Images
3
Google News
2
hacked sites
12
hangout
2
hreflang
3
https
5
images
12
intermediate
205
interstitials
1
javascript
8
job search
2
localization
21
malware
6
mobile
63
mobile-friendly
14
nohacked
1
performance
17
product expert
1
product experts
2
products and services
63
questions
3
ranking
1
recipes
1
rendering
2
Responsive Web Design
3
rich cards
7
rich results
10
search console
35
search for beginners
1
search queries
7
search results
140
security
12
seo
3
sitemaps
46
speed
6
structured data
33
summit
1
TLDs
1
url removals
1
UX
3
verification
8
video
6
webmaster community
24
webmaster forum
1
webmaster guidelines
57
webmaster tools
177
webmasters
3
youtube channel
6
Archive
2020
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2019
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2018
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2017
Dec
Nov
Oct
Sept
Aug
June
May
Apr
Mar
Feb
Jan
2016
Dec
Nov
Oct
Sept
Aug
June
May
Apr
Mar
Jan
2015
Dec
Nov
Oct
Sept
Aug
July
May
Apr
Mar
Feb
Jan
2014
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2013
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2012
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2011
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2010
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2009
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2008
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2007
Dec
Nov
Oct
Sept
Aug
July
June
May
Apr
Mar
Feb
Jan
2006
Dec
Nov
Oct
Sept
Aug
Feed
Follow @googlewmc
Give us feedback in our
Product Forums
.
Subscribe via email
Enter your email address:
Delivered by
FeedBurner
