JSFoo 2016

Tackling speed and performance for JavaScript

##About JSFoo

JSFoo is India’s premier JavaScript conference. We launched JSFoo in 2011 as India’s first JavaScript conference. The JS community in India has grown phenomenally since. JavaScript now pervades every aspect of web development – browsers, apps, front-end, backend, mobile, and IoT.

##JSFoo 2016: Theme

Over the last few years, JavaScript has evolved to become the centerpiece of a complex web stack. Today, it is a prime subject of the obsession that lies with performance and speed. How can you get pages to load faster? How do you work with browser constraints to enhance speed? How do you measure performance? What actually is performance? In what ways do faster response times influence your architecture choices and plans? How is this new focus on faster page loads and apps working offline influencing the development of front-ends and backends as well as server side JS?

The theme for the 2016 edition is tackling speed and performance for JavaScript.

We are inviting full talks (40 mins), crisp talks (15 mins + 5 mins Q&A), and 3-6 hour long (hands-on) workshops from practitioners on the overall theme of speed and performance, including the following topics:

  • Architecting for performance – case studies on how you got faster response times
  • Best practices: debugging and profiling on the web, measuring performance
  • Handling large volumes of data in the browser
  • Building and deploying web apps eg webpack, travis
  • Modern web technology: Angular 2, React
  • Universal JavaScript: meteor js
  • Progressive Web Apps
  • JS off the web – raspberry pi, IoT
  • The cutting edge: elm

This year, JSFoo will feature two days of talks on JavaScript (15-16 September) and a single day of talks on design (17 September) at Meta Refresh (call for proposals will open shortly).

Guidelines for submission

Every proposal MUST be accompanied by:

  • A three minute preview video where the proposer gives an elevator pitch about the talk.
  • Detailed outline of the talk – either in the form of draft slides, mind map and/or textual description.
  • If you are proposing to speak on a topic where the code is not open-sourced yet, the editorial panel will consider your proposal only if the code is made open-source at least three weeks before the conference.

Without the above information, your proposal will not be considered for review.

If you are submitting a Workshop Proposal, you must clearly state:

  • Background knowledge that participants must possess in order to attend your workshop.
  • Details and links to software / packages which participants must install before coming to the workshop.
  • Laptop configuration.
  • Links to background reading material and GitHub repos.
  • Duration of the workshop.
  • Maximum number of participants who can attend your workshop.
  • Instructor’s past experience with conducting workshops.

There is only one speaker per session. Workshops can have two or more instructors.

Entry is free for selected speakers.

Due to budgetary constraints, we prefer speakers closer to home. But if we think you stand out, we’ll provide a grant to cover part of your travel and accommodation to Bangalore. Grants are limited and are made available to speakers delivering full sessions (40 minutes or longer) only.

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 for it to be available under a permissive open source licence. If your software is commercially licensed or available under a combination of commercial and restrictive open source licences (such as the various forms of the GPL), please consider picking up a sponsorship. We recognise 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.

Important dates:

Deadline for submitting proposals: 29 August 2015
Conference dates: 15-16 September

JSFoo will be held at the MLR Convention Centre, J P Nagar.

For more information about speaking proposals, tickets and sponsorships, contact info@hasgeek.com or call +91-7676332020.

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

Aakash Goel


Scaling Cheapass.in from 0 to over 5,00,000 price drop alerts

Submitted Aug 13, 2016

Scaling cheapass.in from 0 to 5,00,000 alerts.

I am the creator of cheapass.in, a service which sends real time price drop alerts across popular Indian e-commerce websites. Products can be added for price tracking via a website, a bookmarklet or an Android app. Price drop alerts are then received by emails, and push notifications on Android and iOS.

The journey begins in June 2014, is still alive and kicking, and is proactively making an impact in the lives of about 5000+ people on a regular basis.

This talk will not be about the “best-way” of doing things, but how a single person team faced challenges on a regular basis due to growing product usage, learned things along the way and brought in optimizations to keep the systems going. I’ve wore all hats possible while building this product - design, product management, marketing, sales tie-ups, social media management, customer support and drum-rolls development.

I will be open sourcing the cheapass git repository before the talk, picking up git commits that brought in significant performance impact and explain what went wrong and what fixed it.


Here’s a mind map of what the talk would be shaped around -

  • how tiny problems we face on a daily basis can be prototyped quickly using full stack JS. Cheapass started as a service which I built for myself to track product prices on Flipkart.
  • how I did just-in-time optimizations to fix the app every time it went down or unbearably low on performance.
  • how I gave what people wanted (push notifications and mobile dashboards on iOS and Android) by putting in the least of the efforts. React Native, FTW! Code already open sourced.
  • creating flexible APIs to feed multiple clients. Cheapass supports product tracking via a website, a bookmarklet, an Android app and an iOS app.
  • how I created a twitter bot @CheapassAlerts to organically grow the daily active users and daily signups.
  • how to get started with native mobile app development with your existing JS knowledge.
  • closing with Q&A

Speaker bio

“Move fast and Break things”, I mostly live on the bleeding edge of the technology. I lead Frontend Engineering at Instamojo.com where I enable payments across devices and platforms using ReactJS and PWAs. Currently maintaning several ReactJS, Redux, Webpack apps with shared codebase in a single repository. I also have a huge stage fright.




{{ gettext('Login to leave a comment') }}

{{ gettext('Post a comment…') }}
{{ gettext('New comment') }}
{{ formTitle }}

{{ errorMsg }}

{{ gettext('No comments posted yet') }}

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