Chromium Blog
News and developments from the open source browser project
Data Compression in Chrome Beta for Android
Dienstag, 5. März 2013
Today’s Chrome Beta for Android
update
brings your saved passwords and autofill entries from your desktop to your phone and tablet. This release also introduces an experimental data compression feature that will yield substantial bandwidth savings. This feature is powered by a connection to a
SPDY
proxy running on Google’s servers, paired with content optimization performed by our
open-source PageSpeed libraries
, specifically tuned for Chrome Beta on Android.
By using SPDY, the proxy is able to multiplex multiple request and response streams in parallel over a single TCP connection to your phone or tablet. When this new feature is enabled (enable the “Experimental Data Compression Proxy” under
chrome://flags
) the browser-to-proxy connection is over SSL, for a more secure browsing experience. In addition, only HTTP traffic is routed through and optimized by the proxy, so secure (HTTPS) requests will bypass the proxy and continue to connect directly to the destination. Furthermore, DNS lookups are performed by the proxy, instead of on the mobile device. Turning on this experimental feature also enables
Safe Browsing
.
For an average web page, over 60% of the transferred bytes are images. The proxy optimizes and transcodes all images to the
WebP format
, which requires fewer bytes than other popular formats, such as JPEG and PNG. The proxy also performs intelligent compression and minification of HTML, JavaScript and CSS resources, which removes unnecessary whitespace, comments, and other metadata which are not essential to render the page. These optimizations, combined with mandatory gzip compression for all resources, can result in substantial bandwidth savings.
For a deeper dive into the technical details, check out our
whitepaper
in Chrome for Android’s developer documentation. The latest version of Chrome Beta for Android is available on
Google Play
(use the link, you won't find it in search)! We look forward to your early
feedback
.
Posted by Matt Welsh, Software Engineer & Mobile Web Performance Gearhead
Update April 10, 2013:
To enable this experimental data compression feature, go to “Bandwidth Management” in Settings and enable “Reduce Data Usage.” From the most recent Chrome Beta for Android
release
onwards, no need to look under
chrome://flags
.
Labels
$200K
1
10th birthday
4
abusive ads
1
abusive notifications
2
accessibility
3
ad blockers
1
ad blocking
2
advanced capabilities
1
android
2
anti abuse
1
anti-deception
1
background periodic sync
1
badging
1
benchmarks
1
beta
83
better ads standards
1
billing
1
birthday
4
blink
2
browser
2
browser interoperability
1
bundles
1
capabilities
6
capable web
1
cds
1
cds18
2
cds2018
1
chrome
35
chrome 81
1
chrome 83
2
chrome 84
2
chrome ads
1
chrome apps
5
Chrome dev
1
chrome dev summit
1
chrome dev summit 2018
1
chrome dev summit 2019
1
chrome developer
1
Chrome Developer Center
1
chrome developer summit
1
chrome devtools
1
Chrome extension
1
chrome extensions
3
Chrome Frame
1
Chrome lite
1
Chrome on Android
2
chrome on ios
1
Chrome on Mac
1
Chrome OS
1
chrome privacy
4
chrome releases
1
chrome security
10
chrome web store
32
chromedevtools
1
chromeframe
3
chromeos
4
chromeos.dev
1
chromium
9
cloud print
1
coalition
1
coalition for better ads
1
contact picker
1
content indexing
1
cookies
1
core web vitals
2
csrf
1
css
1
cumulative layout shift
1
custom tabs
1
dart
8
dashboard
1
Data Saver
3
Data saver desktop extension
1
day 2
1
deceptive installation
1
declarative net request api
1
design
2
developer dashboard
1
Developer Program Policy
2
developer website
1
devtools
13
digital event
1
discoverability
1
DNS-over-HTTPS
4
DoH
4
emoji
1
emscriptem
1
enterprise
1
extensions
27
Fast badging
1
faster web
1
features
1
feedback
2
field data
1
first input delay
1
Follow
1
fonts
1
form controls
1
frameworks
1
fugu
2
fund
1
funding
1
gdd
1
google earth
1
google event
1
google io 2019
1
google web developer
1
googlechrome
12
harmful ads
1
html5
11
HTTP/3
1
HTTPS
4
iframes
1
images
1
incognito
1
insecure forms
1
intent to explain
1
ios
1
ios Chrome
1
issue tracker
3
jank
1
javascript
5
lab data
1
labelling
1
largest contentful paint
1
launch
1
lazy-loading
1
lighthouse
2
linux
2
Lite Mode
2
Lite pages
1
loading interventions
1
loading optimizations
1
lock icon
1
long-tail
1
mac
1
manifest v3
2
metrics
2
microsoft edge
1
mixed forms
1
mobile
2
na
1
native client
8
native file system
1
New Features
5
notifications
1
octane
1
open web
4
origin trials
2
pagespeed insights
1
pagespeedinsights
1
passwords
1
payment handler
1
payment request
1
payments
2
performance
20
performance tools
1
permission UI
1
permissions
1
play store
1
portals
3
prefetching
1
privacy
2
privacy sandbox
4
private prefetch proxy
1
profile guided optimization
1
progressive web apps
2
Project Strobe
1
protection
1
pwa
1
QUIC
1
quieter permissions
1
releases
3
removals
1
rlz
1
root program
1
safe browsing
2
Secure DNS
2
security
36
site isolation
1
slow loading
1
sms receiver
1
spam policy
1
spdy
2
spectre
1
speed
4
ssl
2
store listing
1
strobe
2
subscription pages
1
suspicious site reporter extension
1
TCP
1
the fast and the curious
23
TLS
1
tools
1
tracing
1
transparency
1
trusted web activities
1
twa
2
user agent string
1
user data policy
1
v8
6
video
2
wasm
1
web
1
web apps
1
web assembly
2
web developers
1
web intents
1
web packaging
1
web payments
1
web platform
1
web request api
1
web vitals
1
web.dev
1
web.dev live
1
webapi
1
webassembly
1
webaudio
3
webgl
7
webkit
5
WebM
1
webmaster
1
webp
5
webrtc
6
websockets
5
webtiming
1
writable-files
1
yerba beuna center for the arts
1
Archive
2024
Aug.
Juni
Mai
Apr.
März
Feb.
2023
Nov.
Okt.
Sept.
Aug.
Juni
Mai
Apr.
Feb.
2022
Dez.
Sept.
Aug.
Juni
Mai
Apr.
März
Feb.
Jan.
2021
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2020
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2019
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2018
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2017
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2016
Dez.
Nov.
Okt.
Sept.
Aug.
Juni
Mai
Apr.
März
Feb.
Jan.
2015
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2014
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2013
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2012
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2011
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2010
Dez.
Nov.
Okt.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2009
Dez.
Nov.
Sept.
Aug.
Juli
Juni
Mai
Apr.
März
Feb.
Jan.
2008
Dez.
Nov.
Okt.
Sept.
Feed
Follow @ChromiumDev
Give us feedback in our
Product Forums
.