Yahoo Performance Summit: Performance Matters, speed is an essential feature


-by Puneet Mohan Sangal, Product Lead Web Performance, Yahoo

Yahoo values speed. We continuously work on every product and page to ensure that our users have the best experience, and can engage with Yahoo pages or apps wicked fast.

We recently held a unique Performance Summit at Yahoo, at our Sunnyvale Campus, that brought together experts from the industry, academia and Yahoo. The intent was for Yahoos to participate with thought leaders in the industry and academia while laying the groundwork for future collaboration.

Ilya Grigorik from Google spoke about experiences implementing and optimizing Transport Layer Security (TLS) at Google. He presented optimizations to reduce latency overhead by reducing the RTTs in TLS handshake, and reduce operational overhead by leveraging hints, SPDY, and http/2.

Stefano Bertacchi from Yahoo described the new rendering pipeline implementation in Flickr.

Sophia Wang from the University of Washington at Seattle spoke about recent research results on the effect of dependencies in page load times and on SPDY performance.

The mobile panel discussion provided techniques for optimizing latency and user experience for mobile. The panelists included Grigorik in addition to Manish Lachwani and Jay Srinivasan from Appurify, and was moderated by Puneet Mohan Sangal from Yahoo.

Professor Theo Benson from Duke University showed his work on datacenter traffic burstiness and packet losses, and traffic engineering strategies to reduce burstiness.

Dr. Amogh Dhamdhere from UC San Diego presented his ongoing study of congestion at Internet peering points, which would impact the performance of content delivery.

Professor Seshan from Carnegie Mellon University presented his group’s work on measuring video quality and the feasibility of peer-to-peer video distribution.

And finally, Satender Saroha (Yahoo) showcased the improvements done to, and Puneet Mohan Sangal (Yahoo) demonstrated how to measure and improve time-to-first-frame in video synthetically.

While we could not invite folks outside Yahoo this time, we’re happy to share some of the videos publicly, for the benefit of the performance community.

Page load performance, by Sophia Wang, University of Washington

Datacenter network performance, by Theophilus Benson, Duke University

Mobile Panel discussion, moderated by Puneet Mohan Sangal, Yahoo:

Internet Video quality, by Srinivasan Seshan, Carnegie Mellon University

Measuring congestion, by Amogh Dhamdhere, University of California San Diego

You may reach out to us at

Join Us for the 2nd Annual Hadoop Summit, Europe in Amsterdam

                                                           April 2-3 Amsterdam, Netherlands

Yahoo and Hortonworks are pleased to host the 2nd Annual Hadoop Summit, Europe, the leading conference for the Apache Hadoop community to be held on April 2-3, 2014 in Amsterdam, Netherlands.

The two-day event will feature many of the Apache Hadoop thought leaders who will showcase successful Hadoop use cases, share development and administration tips and tricks, and educate organizations about how best to leverage Apache Hadoop as a key component in their enterprise data architecture. This event will also be an excellent networking event for developers, architects, administrators, data analysts and data scientists interested in advancing and extending Apache Hadoop.

Popular sessions include:

  • The Future of Data

  • Real time stream classification with Storm

  • Apache Hadoop YARN : Present and Future

  • Making Hive Suitable for Analytics Workloads

  • HBase 0.96 - A report on the current status

  • Hive + Tez: A performance deep dive

  • In-memory caching in HDFS: Lower latency, same great taste

Come and listen to Yahoos present the following sessions at the Hadoop Summit this year:

  • Capacity Planning in Multi-tenant Hadoop Deployments - Amritashwar Lal, Sumeet Singh

  • Standalone Block Management Service for HDFS - Edward Bortnikov

  • Real-time streaming classification with Storm - Norman Huang, Jason Lin

You can checkout the full schedule at the Hadoop Summit website.

As a host of this event, Yahoo is pleased to offer you a 20% discount off the registration fee. Enter promo code 14Disc20SponWx to receive your discount.

Register here today!

Yahoo Contacts and Profile APIs move to HTTPS

We recently announced that all Yahoo Mail connections are now encrypted with HTTPS by default.
To support this move, we have also enabled HTTPS access to Yahoo Contacts and Profile APIs.

All developers using the Yahoo Contacts APIs and Profile APIs will need to make the following updates to their API settings by February 27, 2014:

Protocol: HTTPS
Port: 443
The domain name will remain the same.

As of February 28, 2014, we will limit all access to Yahoo’s Contacts APIs and Profile APIs to secure SSL connections only. No user data will be accessible over HTTP from this date onwards. If you don’t switch the access protocol to HTTPS, your users will not be able to access their Yahoo Contacts / Profile data via your service.
Thank you for supporting us and our users in making the shift to HTTPS.

Check Out the Hack Israel Demos

We take great pains to preserve each demo at Yahoo Hack Days, and Hack Israel was no different.

We are now able to share these great demos with you! We’ve embedded the demo that featured our youngest hacker ever (8 years old), but hope you’ll watch the entire YouTube playlist to see them all.



Earlier in December, Yahoo sponsored the Node Summit, a two-day conference in San Francisco which focused on NodeJS’ transformative role in the future of computing whilst also showcasing real-world solutions from a select group of companies working with NodeJS today.

During the event, we…

Watch the Hack Israel recap video

YDN was proud to host Yahoo Hack Israel in November in Tel Aviv.  It was our first hack event in the country, and we were happy to see Israel’s hack community came out in full force.  

You can learn more about Yahoo Hack Israel by reading the several recap posts on our blog.

Yahoo Hack Taiwan: It’s a Wrap!


Congratulations to all the hackers who participated in Yahoo Hack Taiwan last month. Over 200 developers and designers were chosen from more than 700 applicants to participate in this year’s event. Hackers divided into 56 teams to create a diverse array of apps. As with all other Yahoo Hack events, Yahoo Hack Taiwan provided plenty of hospitality, including good food, drinks, ping pong, and other details that kept the energy at a high level.


At the end of 24 hours of hacking, 56 hacks were produced and of those, the following winners were chosen:

First Prize: Good Lock - a text message storage and retrieval Web app for reducing distractions and increasing user productivity. If you know Mandarin, check out the hack demo video for more details on the hack. Technologies used included HTML5, font-awesome, iCulture Open API, jQuery, AngularJS, Bootstrap, Yahoo! pure, Flickr, Rails, and YQL. Watch the screencast.

Second Prize: YA TAIKO! - Google Chrome extension that helps you clean away your Yahoo mailbox immediately and integrating a Taiko-like rhythm game with achievement system. Here is the Ya Taiko screencast in Mandarin. Technologies used included the Yahoo Mail Web Service API and the Facebook Feed Dialog API. Watch the screencast.                     

Honorable Mentions went to two photo hacks that used the Flickr API: FotoFlick and Leak Motion.

Best Student Creative Award: Flickr Land

TMI Creative Award: DuDuBox

Taipei City Government Open Data Application Award: Hanzi Fusion Reactor, iWaiter, and Pulse City Voice

iCulture Art Creative Pioneer Award: ARTOUR

iCulture Art Breakthrough Award: Flickr Land

Hackers’ Choice: Congress Cinema

Best Design Award: iOlder - a volunteer recruitment platform to enable people to help the elderly. Technologies used included iOS.


Yahoo Hack Taiwan rounds out a whirlwind year for Yahoo Hack events that have happened in London, Beijing, Tel Aviv, Hyderabad, and Sunnyvale. We’d like to thank all of the people involved in making Yahoo Hack Taiwan possible, including the organizers, judges, and of course, the hackers.

Until next time!