JSFoo 2014

JavaScript as the centerpiece of a complex web stack

In 2011, Node.js put JavaScript firmly in the backend, making JavaScript developers productive at both ends of the stack, and making it possible for business logic to finally be moved into JavaScript.

In 2012, AngularJS made us think about moving business logic completely into the client-side as an actually sensible idea. Meteor give that idea two thumbs up.

In 2013, we went wild thinking of all the possibilities. JavaScript phones! Robots!

In 2014, it’s time for some sobering up. The backends we built over a decade in Ruby and Python aren’t going away. New languages like Go and Hack are tantalising us with new possibilities. Our applications are increasingly distributed, often involving third party APIs. In such a scenario, where does your business logic reside?

In 2014, JavaScript is no longer a toothless child or a rebellious teenager that wants to do everything itself. JSFoo 2014 is about working with JavaScript as the centerpiece of a complex web stack.


This year’s edition spans four days, with two days of workshops and two days of conference. All days feature a single track. We invite proposals for:

  • Full-length 40 minute talks
  • A crisp 15-minute presentation
  • Sponsored sessions, 40 minute duration
  • Flash talks of 5 minutes duration. Submissions for flash talks will be accepted during the event
  • Three hour workshops where everybody gets their laptop out and follows along

Criteria to submit

You must be a practising web developer or designer, and must be able to show how your own work has advanced the state of the web in the past year. You are expected to present original work that your peers — this event’s audience — recognise as being notable enough to deserve a stage.

If you are excited about someone’s work and believe it deserves wider recognition, we recommend you contact them and ask them to submit a proposal.

Selection Process

Voting is open to attendees who have purchased event tickets. If there is a proposal you find notable, please vote for it and leave a comment to initiate discussions. Your vote will be reflected immediately, but will be counted towards selections only if you purchase a ticket.

Proposers must submit presentation drafts as part of the selection process to ensure that the talk is in line with the original proposal, and to help the editorial panel build a strong line-up for the event.

There is only one speaker per session. Entry is free for selected speakers. HasGeek will cover your travel to and accommodation in Bangalore from anywhere in the world for speakers delivering full sessions (30 minutes or longer). As our budget is limited, we will prefer speakers from locations closer home, but will do our best to cover for anyone exceptional. If you are able to raise support for your trip, we will count that as speaker travel sponsorship.

If your proposal is not accepted, you can buy a ticket at the same rate as was available on the day you proposed. We’ll send you a code.

Commitment to Open Source

HasGeek believes in open source as the binding force of our community. If you are describing a codebase for developers to work with, we’d like it to be available under a permissive open source license. If your software is commercially licensed or available under a combination of commercial and restrictive open source licenses (such as the various forms of the GPL), please consider picking up a sponsorship. We recognize that there are valid reasons for commercial licensing, but ask that you support us in return for giving you an audience. Your session will be marked on the schedule as a sponsored session.

Hosted by

JSFoo is a forum for discussing UI engineering; fullstack development; web applications engineering, performance, security and design; accessibility; and latest developments in #JavaScript. Follow JSFoo on Twitter more

Ankit Rastogi


Home Brewing R.U.M - Analyzing application performance with real user monitoring

Submitted Jul 8, 2014

Real User Monitoring (R.U.M)

The objective of this session is to discuss the tools and techniques through which we can continuously monitor the performance experienced by the real end users instead of scripted test cases.
By continuously monitoring the performance bottlenecks, which may be Janks, slow page load, application errors, Ajax request performance & custom performance metrics, that user are encountering we can enrich their experience and hence our retention and conversion rates. It will also help in identifying the issues/errors that even a single user is encountering. In this session we will also discuss how to make such real user monitoring (R.U.M) system in-house using open source tools.

This session is targeted for web application and mobile app developers & testers, and also business stakeholders who want to see their application perform to the best of user expectations. After this session, participants will get an understanding of Real User Monitoring practices & advantages. They will be able to implement R.U.M processes in their projects and deliver exceptional performance to end users.


It is a true fact that performance experienced by real world users has direct impact on our application adoption rate.Good performance increases retention and conversion rates. Our primary aim should be to deliver value to an user, and make sure that they get the best possible user experience that delights them, and keeps them coming back for more. In this regard, monitoring user behaviour becomes imperative as it provides key metrics for web application performance. While developing web applications, developers test in their local environments, and also do user acceptance testing. But what happens once the application goes out onto the real world? The case I’m making here talks about analysing application performance once its in the hands of real users.

This is where real user monitoring a.k.a R.U.M comes in picture. R.U.M captures performance metrics such as bandwidth and page/view load times, user location, device type, carrier speed, application errors, Ajax request and application usage along with custom performance metrics that provides actionable business intelligence.

In R.U.M, we can then visualize performance over time for key metrics based on different average, geometric mean, median or percentile calculations. The performance data can be drilled down further on the basis of geography, device, error encountered, speed etc.

In the session we will cover

  • What is Real User Monitoring (R.U.M)

  • How Developers and Business can benefit from it

  • How to implement R.U.M for web and mobile applications

  • How to build your own R.U.M solution using open source tools like Elastic Search, LogStash and Kibana



Speaker bio

Ankit Rastogi is a Consultant at Xebia. He has received a B.Tech. degree in Electronics and Communications. He has been active in the area of JAVA/J2EE/Javascript Enterprise web applications and Mobile apps development for the past 4 years. His international experience includes projects and consultancies in America, Switzerland, Netherlands, India. His current area of interest involves development and performance optimization of web & mobile apps. Currently in his free time he is actively developing an open source Real User Monitoring (R.U.M) solution for web & mobile apps that will provide key performance insights which can be turn into business intelligence.


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Hosted by

JSFoo is a forum for discussing UI engineering; fullstack development; web applications engineering, performance, security and design; accessibility; and latest developments in #JavaScript. Follow JSFoo on Twitter more