Chromium Blog
News and developments from the open source browser project
Chrome Dev Summit 2015: That’s a wrap!
Wednesday, November 18, 2015
Posted by Darin Fisher, VP Engineering, Chrome
The last sessions of the Chrome Dev Summit 2015 are coming to a close, so it’s the perfect time to reflect on the event. We started our annual summit back in 2012, where we first introduced Chrome on Android. Today, there are more than 800 million monthly active users on Chrome for Android.
The greatest power of the Web is in its reach—not just across devices and operating systems, but in reaching users. Top mobile web properties are seeing
2.5 times the number
of monthly unique visitors compared to the top mobile apps, and mobile web reach is growing at more than twice the rate of mobile app reach. This reach offers a unique opportunity to engage with more users.
We believe this is a pivotal moment for the web platform, as early adopters of a set of key enabling technologies and tools are seeing success.
During the
keynote
, we covered the evolution of the mobile platform and the shift towards “
progressive web apps
,” which are fast, robust, app-like experiences built using modern web capabilities. The web has come a long way, and building immersive apps with web technology on mobile no longer requires giving up properties of the web you’ve come to love. Flipkart’s new mobile web experience is a great example of a progressive web app that uses the new capabilities to provide a next-generation user experience.
In practice, progressive web apps have three main aspects that separate them from traditional websites: reliability, performance, and engagement.
Reliability
Every web app should load quickly, regardless of whether a user is connected to fast Wi-Fi, a 2G cell network, or no connection at all. We envision
service workers
as the ideal way for developers to build web apps that are resilient despite changing and unreliable networks. We've released two
libraries
to help take the work out of writing your own service worker:
sw-precache
and
sw-toolbox
for your App Shell and dynamic content, respectively. Once your implementation is up and running, you can easily test it on different network connections using
Chrome DevTools
and
WebPageTest
. Service workers are already seeing great adoption by developers: there are currently 2.2 billion page loads a day using service workers, not counting its use in the New Tab page in Chrome.
Performance
The
RAIL
performance model helps you figure out what a user expects from each interaction with your site or app, breaking down performance into four key goals:
Responses (tap to response) should be less than 100ms
Animations (scrolling, gestures, and transitions) should run at 60 frames per second
Idle time should be used to opportunistically schedule non-essential work in 50ms chunks
Loading should be finished in under 1 second
In practice, we've found improving even just one area of RAIL performance can make a dramatic difference on the user experience. For example, a one second difference in loading time can have as much as an
11% impact on overall page views and a 16% impact on customer satisfaction
.
Engagement
Traditionally, users have had a hard time re-engaging with sites on the web.
Push notifications
enable you to build experiences that users can engage with "outside of the tab"--they don’t need to have the browser open, or even be actively using your web app, in order to engage with your experience. Best of all, these notifications appear just like other
app notifications
. Currently we’re seeing over 350 million push notifications sent every day in Chrome, and it’s growing quickly. Beyond the Rack
has found
that users arriving to their site by push notifications browse 72% longer than average users and spend 26% more.
Tools for Success
Finally, Google is committed to making web developers successful. As our generalized library for building components on the web,
Polymer
is also deeply focused on helping developers achieve RAIL. Since its 1.0 release at Google I/O earlier this year, it has grown to be used on over 1 million web pages, including more than 300 projects within Google. Polymer 1.0 was 3 to 4 times faster than the previous 0.5 version, and the latest 1.2 release is even 20% faster than that. To get started with this modern way of thinking about web development, take a
quick tour of Polymer
, watch the
Polymer Summit talks
, check out the
Polymer codelabs
,
or try the
Polymer Starter Kit
.
We already have great resources like
Web Fundamentals
that we continue to expand and improve. We’re also committed to documenting each new feature we ship on the
Mozilla Developer Network
. In the past year alone, we’ve made 2,800 individual edits to MDN and created 212 new pages. To further our commitment to educating web developers, we’ve partnered with Udacity to offer a
senior web nanodegree
, an education credential focused on modern web technologies and techniques like service workers, Promises, HTTP/2 and more.
For all the details on Chrome Dev Summit 2015, you can watch
full session videos
, which we will continue to upload as they’re ready. Thanks for coming, thanks for watching, and most of all, thank you for developing for the web!
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