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A screencast showing a mashup using Google Analytics, Protovis, SVG, JQuery, Google App Engine, and GData. Done by Nick Mihailovski.

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Summary
Avi Bryant talks about the iterative process that led to Trendly (http://trendly.com/ ), using Javascript, Ruby and Java in the process. He goes on to give his view on the state of Smalltalk and Squeak and talks about his experiments with writing a Smalltalk that compiles to idiomatic Javascript to make use of all the modern Javascript VMs.

Bio
Avi Bryant is the co-CEO of Dabble DB, a Vancouver startup focused on web-based data management and collaboration tools. He is the author of the Seaside web application framework, and is active in the open source Squeak Smalltalk community. His latest project is http://trendly.com/

About the conference
FutureRuby isn't a Ruby conference, but a conference for Rubyists. This is a call to order - a congress of the curious characters that drew us to this community in the first place. We have a singular opportunity to express a long-term vision, a future where Ruby drives creativity and prosperity without being dampened by partisan politics.

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Created by Drew Douglass.

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Created by Drew Douglass.

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Learn how Google Chrome makes it easy to write extensions using the web technologies you already know. This talk will describe the extension system in depth, covering the anatomy of an extension, the process model, and more.

Nick Baum, Aaron Boodman

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Get some real world advice from developers that have created successful businesses around their social apps. From monetization strategies to analytics, learn how to turn a fun idea into a real revenue stream.

Shawn Shen, Chewy Trewhella, Gerardo Capiel

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Created by Drew Douglass.

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John Resig presents his mystery topic, which is actually three topics that strike his interest. First up is measuring performance and a quick introduction to benchmarking (and its positives and negatives). This is followed by JavaScript Games which he unveils some super cool hidden functionality (cheat codes++) on the jQuery web site. This is followed up by the introduction of John's distributed continuous test framework platform, Test Swarm. It is jam packed with Nirvana and goodness so be sure to watch both parts.

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John Resig presents his mystery topic, which is actually three topics that strike his interest. First up is measuring performance and a quick introduction to benchmarking (and its positives and negatives). This is followed by JavaScript Games which he unveils some super cool hidden functionality (cheat codes++) on the jQuery web site. This is followed up by the introduction of John's distributed continuous test framework platform, Test Swarm. It is jam packed with Nirvana and goodness so be sure to watch both parts.

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Google offers a wide variety of APIs in many domains that together form a complete platform, from authentication and authorization, cloud computing, and social networking, to visualization, mobile computing, and Google Web Toolkit. In this talk, we will walk though a complex application that integrates many APIs together, how each can solve a different need in your application, how you can share code between GWT, Android, and App Engine, and how you can monetize your application with Google Checkout.

Ray Cromwell

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In this session, we will show how to use Google Wave APIs through demos and code samples. Learn how to add waves to your web site, extend Google Wave with both client- and server-side code, and integrate Google Wave with other services like Twitter or your favorite bug database.

Douwe Osinga

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This session will focus on building a server-side data source compatible with the Visualization API. It will cover the following topics: Using available Libraries for generic data sources, writing a datasource, and datasources on AppEngine.

-- Contents --
0:05 - Agenda
1:00 - What is Google Visualization API?
9:30 - Remote Data Source
14:32 - The Java Open Source Data Source library
17:04 - Java Data Source Demo
31:48 - SalesForce.com Data Source implementation
43:20 - Q&A
-- End --

Itai Raz, Nir Bar-Lev, Jesse Lorenz

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As an interpreted language, JavaScript is filled with hidden performance issues that conspire to slow down your code and ruin the user experience. Learn exactly what is fast, what is slow, and what you can do to squeeze that last bit of performance out of your JavaScript code.

Nicholas C. Zakas is the author of Professional JavaScript for Web Developers, 2nd Edition (Wrox, 2009), co-author of Professional Ajax, 2nd Edition (Wrox, 2007), and a contributor to Even Faster Web Sites (O'Reilly, 2009). Nicholas is principal front end engineer for the Yahoo! homepage and is also a contributor to the Yahoo! User Interface (YUI) library.

The Web Exponents Series is hosted by Steve Souders

Presented by Nicholas C. Zakas.
Google Tech Talk
June 4, 2009

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One of the nicest things about working on an open source project is the atmosphere of community collaboration and brainstorming that it fosters. The GWT engineering team has been listening hard to the community about how GWT can be improved, and we're excited to take you on a tour of the powerful new features that have resulted. GWT 2.0 contains huge improvements, including dynamic script loading, a new catalog of compiler optimizations, and a new approach to hosted mode debugging that promises to revolutionize your productivity. Without a doubt, it will change the way you use GWT.

Bruce Johnson

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Steve is the author of High Performance Web Sites and the creator of YSlow. In this talk, he presents some of the best practices from his next book, including optimizing CSS selectors, flushing the document early, and discovering why 15% of users don't get compressed responses.

Steve Souders

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Google Apps Script allows customers to automate actions within apps and across apps. This session provides an early view and demonstration of creating and editing scripts, custom spreadsheet functions, custom menus and buttons, changing spreadsheet data, sending email, fetching web page content, language translation.

Jonathan Rochelle

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Recently, Google Data APIs have implemented new technologies in order to make applications and communications with Google Data APIs more efficient. We'll present these new technologies, including ETags, Partial Get and Update, and a new compact JSON format, and show how you can use them to improve your applications. We'll demonstrate these features by showing an example built on top of the Google Photos (Picasa Web Album) API.

Sven Mawson

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To some of you, the YouTube APIs are intimidating, and the Terms of Service intricate. Let us show you how to avoid common technical and business pitfalls, and explain how you can develop and even monetize apps that enable users to access YouTube videos in creative and original ways.

Kuan Yong

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With Google Friend Connect, hosting a couple files and dropping in some JavaScript is all it takes to instantly awaken the community that visits your site -- but there's so much more! In this session we'll show you how to use Friend Connect as a login provider for a website with an existing accounts infrastructure, and how to extend your existing data models with social data. With Friend Connect, you can keep your visitors more deeply engaged with your site and with each other.

Arne Roomann-Kurrik, Patrick Chanezon, Chris Schalk

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In this session, learn advanced Javascript, why App Engine is so easy to develop on, protecting from XSRF vulnerabilities, cutting the load time of your app in half, and hear about general client-side web app techniques. These lessons are taught in the context of the design and development of the AJAX API Playground (http://code.google.com/apis/ajax/playground/), a tool which can help developers learn about and experiment with many of Google's APIs.

Ben Lisbakken

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Make your apps fast, secure, and scalable by taking advantage of recent updates in the OpenSocial spec, like templates, data pipelining, and proxied content. Learn how to make use of all the tools in the OpenSocial toolbelt, from client libraries to coding aides.

Arne Roomann-Kurrik, Chris Chabot

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In this session we'll show how you can get the most out of GWT in development, testing and deployment. It's based on our two and half years of experience building Lombardi Blueprint, a SaaS application for collaborative business process documentation. We'll cover how you can effectively integrate GWT into your development process and how to structure your code and application to take advantage of GWT's unique features in order to provide the best possible user experience. Focus: Achieving high performance, sharing code between client and server, building and testing your application, multi-page application architecture, tips and tricks.

Alex Moffat, Damon Lundin

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Google Web Toolkit is providing more and more information to developers in terms of how it is compiling your code, and how you can improve it. In this session, we will explain the tools available to you, how to interpret the results, and how you can guide this choose-your-own-adventure in the direction you want.

Bruce Johnson, Lex Spoon

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V8 is Google's high-performance JavaScript engine used in Google Chrome. V8 is optimized for well-designed object-oriented applications that make heavy use of objects, function calls, and property access. This talk will provide an overview of the internals of V8 and dive into the advanced virtual-machine technology used. Specifically, details of the use of hidden classes, inline caching, precise generational garbage collection, and snapshotting will be presented. The final part of the talk will discuss initiatives that will propel V8 to the next performance level.

Mads Ager

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O3D allows you to create rich 3D web applications using JavaScript. This talk will primarily cover best practices for getting 2D and 3D content into O3D. We will also explore the API's advanced features, primarily through demos and coding examples to keep the session fun.

Vangelis Kokkevis, Gregg Tavares

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Some applications require high-performance client-side computation. Native Client is a technology for running native code in web applications, with the goal of maintaining the browser neutrality, OS portability, and safety that people expect from web apps. This talk will give a brief overview of the architecture of Native Client. We'll then look at some specific example applications as well as strategies for how to use native code to handle compute intensive tasks within web applications using SRPC, Shared Memory and NPAPI.

Brad Chen

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Page Speed is an open source Firebug add-on that gives suggestions on how to improve web page performance. In this talk, we describe the open development model that we have adopted for Page Speed and the importance of decreasing latency to make web applications more responsive.

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Every good developer loves building a bonsai-site—a fast, lean paean to minimalism and efficiency. The DOM tree is carefully pruned, lovingly decorated with tasteful CSS. The browser welcomes it with a sigh of relief. The server’s CPU barely registers, and the database brushes delicately against the SAN, no lookup un-clustered.

Inevitably, such perfection is short-lived. Once the site is deployed, the snowball effect begins. A new panel is added on the top left, resulting in an database call. A new button is prominently displayed on the top navigation, resulting in increased traffic to a very heavy report-style page. A fade-in effect is added to the splash page, resulting in a beefy Javascript download for end users. Like a snowball rolling downhill, the site acrues performance-undermining features. MySpace.com is a several-year-old snow boulder and grows faster the larger it gets. In this talk, we will go over a particular performance monitoring tool we have built. The talk will be liberally dosed with ego-deflating vignettes illustrating our periodic and spectacular mishaps.

System Overview

Over the years, we have witnessed many performance-related disasters at MySpace. These typically resulted in much running around, yelling over red-lined graphs, execution of hastily written scripts, sloppy downings of overheated coffee, and, in the end, the inevitable question: “How can this be prevented in the future?” Usually the answer to this question was, “if only we had avoided this database call.” “If only we had cached this lookup table.” “If only we had avoided this redundant lock.”

The road to performance Hell is paved with “if only”s.

The goal of the system we built is to provide developers with useful performance-related information before their code reaches our staging and deployment process. The system mixes a few hard and fast rules (“avoid inline script tags”) with analytics (“your page allocated 120kb of memory for the last ten months—after your latest commit it allocated 500kb”) to give the developer a sense of what has changed.

Every night the site is compiled and deployed to a series of testing servers. This process is totally automated and requires no developer intervention. The profiling consists of two main parts. Client side profiling is used to gauge the performance of the HTML payload in the browser. Server side profiling is used to profile how an individual web server will interact with the MySpace ecosystem.

Client Side Profiling

The Client-side profiling portion of our system tracks everything that happens from the moment the HTML leaves our web server to the moment the page is completely rendered on the user’s browser.

This system is a combination of 2 components; an Internet Explorer Plugin that tracks the performance and HTML events on the user’s machine, and a custom HTTP Proxy which simulates a slow connection and injects custom javascript code into the tested page.

Using this system, we track and analyze the following data points:

• Render Time Profiling o Time it took for each HTML element to be rendered on the browser o Which element takes the longest to be rendered o Automatic identification of rendering bottlenecks o Which HTML/JavaScript code was executed during rendering of each element o Which files were downloaded during the rendering of each element
• Downloaded Data o Total download size o Size of external stylesheets o Size of external Javascript o Size of linked images
• Performance Data o Processor Time – CPU Usage on the client side (Browser’s process) o Private Working Set – Memory state of the browser during page rendering
• Source Validation o A complete list of HTML guidelines/rules which we want to avoid; such as “Don’t put <link> tags in the HTML’s “<body>“

Server Side Profiling

The Server Side Profiler runs at the same time as the Client Side Profiler, tracing the execution and operating system interaction of the server code as the page is rendered. Below are examples of the data point tracked:

• Number of database calls
• Number of cache calls
• Number of external http requests
• Total number of method calls
• Redirects
• Memory allocations by calls and memory totals.
• Number of locks per request

Developer Tool Bar

The “Developer Tool Bar” is a browser toolbar that gives the developer a complete real-time analisys of his front-end code performance. Our toolbar provides a duplicate method of testing the HTML payload before a developer checks in their source. This places the importance of performance as far forward as possible in the development cycle.

With this toolbar, our developers could:

• Profile the rendering of the page under various connection speed
• Easily identify rendering bottlenecks
• Test the size of the page’s elements
• View the load order of each element
• Take a snapshot of the browser’s CPU and memory footprint
• Validate the output HTML against our coding standards

Notification System*

The Notification portion of the system allows developers who integrate with the Performance system to notify the subscribed users based on cutomizable criteria.

Examples:

• Server Side Performance Alerts o Number of Database calls increase o Number of Cache call increase o Amount of memory allocated per requests increases
• Client Side Performance Alerts o Download size increases o Browser memory working set increases o Average render time increases o Source Validation failures

Chris Bissell

MySpace

Chris is the Chief Software Architect at MySpace.com. In other words, he comes up with overly convoluted ‘design patterns’ in order to lengthen the development process.

Jeremy Custenborder

MySpace.com

Jeremy Custenborder has spent several years in the trenches at MySpace, resolving many bottlenecks and issues.

Yadid Ramot

MySpace.com

Yadid has spent much time mentoring the MySpace development community on client site performance.

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In Facebook, we integrate features and applications deeply into each page. Such deep integration presents both opportunities and challenges to the frontend performance engineering (“Frontend” refers to browser render time):

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I plan to present on overview of front-end performance techniques applied on Google Search. Topics will include: - Progressive Rendering and HTTP chunking - Deferred JS loading techniques - CSS woes - Using “Ajax” techniques to improve Search latency - Browser quirks - Productionizing clientside script at Google scale.

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Watch interviews from the conference floor at the 2009 Google I/O Developer Sandbox. Developers chat with us on their apps and share technical as well as business insights on challenges and best practices.

Company interviewed: Apptio

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The greatest advantage that Coda has over TextMate is that you can work directly on your server. Obviously, by removing the middle-man, we can work much more quickly. This is a bit unfortunate, as TextMate is a much more powerful platform. Thanks to Twitter, I’ve just learned how to work around this. We’ll use a program, for Mac and PC, called ExpanDrive. For more information, check out this quick screencast.

Created by Jeffrey.

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Here is my second screencast for the EC blog, this time talking about Ajax file uploads in Rails using jQuery.

Created by adamlogic

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So, a few weeks back I showed you how you could see your CSS changes in real-time in any browser (http://blog.edgecase.com/2009/4/6/see-your-css-changes-in-real-time-in-any-browser). That was cool and all, but I haven't found myself using it simply because of the convenience factor. The script had to be included in the page, whereas I could just fire up Web Developer Toolbar in an instant.

Today I'm introducing the bookmarklet version of that same script. It no longer requires jQuery, so just drag the link below up to your bookmark toolbar, and you'll have this functionality one click away.

Created by adamlogic

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O3D allows you to create rich 3D web applications using JavaScript. This talk will primarily cover best practices for getting 2D and 3D content into O3D. We will also explore the API's advanced features, primarily through demos and coding examples to keep the session fun.

For those who are attending Google I/O 2009 (http://code.google.com/io/), these video are an opportunity to hear from some of the speakers in advance. The speakers introduce their topic and provide a preview of one or more topics that will be covered in their talks.

Vangelis Kokkevis & Gregg Tavares

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This video demonstrates a visual search web application. The application was created by Disney / ABC and presented at Google I/O's Developer Sandbox. To render 3D graphics in the browser, Disney used O3D, an open-source web API for creating rich, interactive 3D applications in the browser. Learn more about O3D at http://code.google.com/apis/o3d. To learn more about Disney's developer efforts visit http://developer.abc.com/

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This photo gallery will automatically build itself from a directory of images, including subdirectories and the images inside them. Images open in a nice looking jQuery lightbox.

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Summary
In the Ruby world, no serious programmer would write an application without a comprehensive test suite. Unfortunately, the realities of integration testing the presentation layer of an Ajax-heavy web application has forced today's programmers to rely on kludges like HTML parsing in Ruby (which can't be used to test JavaScript comprehensively) or Selenium (which requires real-life browsers on every platform armed and ready). Screw that! With Johnson, a transparent Ruby to JavaScript bridge, you can test your JavaScript-heavy pages with ease. Because Johnson is embedded inside of Ruby, you'll be able to run tests directly in JavaScript, and then access JavaScript components in the tests (think Rails.dispatch_to("controller", "action")). I'll show you how to use Screw.Unit for browserless tests of your presentation layer. If you use continuous integration (and you should), you'll be able to easily catch bugs in your presentation layer without having to defer to a real browser running your tests. 

Bio
Yehuda Katz is the plugins team leader of the jQuery project. He is also a core team member of the Merb and Ruby on Rails. Yehuda currently works at Engine Yard, where he works on the Merb Ruby framework. Yehuda is the author of jQuery in Action, and is a contributing author for Ruby in Practice.

About the conference
QCon is a conference that is organized by the community, for the community.The result is a high quality conference experience where a tremendous amount of attention and investment has gone into having the best content on the most important topics presented by the leaders in our community. QCon is designed with the technical depth and enterprise focus of interest to technical team leads, architects, and project managers.

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Today's JavaScript is a decent language for writing small scale scripts. But even for beginners, it has too many minefields between what beginners learn and what they need to know. And JavaScript is now increasingly used for serious software engineering projects – straining to carry a load it was not designed for.

After 10 years, the world of JavaScript standards is moving again. The next version, EcmaScript 5, is in "final draft standard" status with implementations about to appear. The "Harmony" agreement sets the direction for future versions beyond EcmaScript 5. The "Secure EcmaScript" working group is working towards an EcmaScript 5 subset suitable for the security needs of inline gadgets, mashups, and more.

In this first talk, we'll explain changes in EcmaScript 5, the problems they're meant to address, the de-facto standards they codify, and how these changes are likely to affect web applications.

Waldemar Horwat has been involved with JavaScript standardization and implementation since the 1990's when he was working on Netscape's implementation. He is a former editor of the standard and wrote parts of the existing ECMAScript Edition 3 standard. He participates in the ECMA TC39 committee and is the Google representative at the ECMA General Assembly.

Mark S. Miller is a research scientist at Google working on Caja, a member of the EcmaScript committee, open source coordinator for the E programming language, a pioneer of agoric (market-based secure distributed) computing, and an architect of the Xanadu hypertext publishing system.

Mike Samuel is an engineer on Caja and a member of the Secure EcmaScript working group.

Presented by Mark Miller, Waldemar Horwat, and Mike Samuel.

Google Tech Talk

May 18, 2009

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John Resig of the Mozilla Corporation, and the creator of the popular jQuery library, talks about the challenges of DOM/JavaScript programming and his preferred strategies for meeting those challenges.

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Google I/O 2009 - Keynote Day 1
full version

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The relational model has long been the domain of databases, but hidden beneath the awkward, non-compositional syntax of SQL lies the relational algebra, an elegant and compact formalism with powerful implications for distributed application design. Because relational models don't rely on pointers and complex object graphs, it's easy to work with them across network boundaries. All data can be represented as sets of scalar-valued tuples, which are easy to encode in JSON, and all model operations can be expressed in terms of create, update, and destroy, which are compatible with REST.

In this talk, I'll introduce two symbiotic libraries that leverage these properties to enable elegant client/server web applications. On the server, there's Unison, with an API similar to ActiveRecord's, but more general. In addition to has_many and friends, Unison adds relates_to_many and relates_to_one, allowing custom associations to be constructed through the composition of relational operators. For the browser, I'll introduce June, which offers a JavaScript version of the same API, along with a relational object-store, and I'll demonstrate how June clients can securely pull arbitrary datasets from a Unison-based server, treating it like a relational database. We'll also explore the nexus of the relational model with event-driven programming and the actor model of concurrent computation.

Speakers: Nathan Sobo

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We’re back with our Wordpress for Designers series! Moving on with our ‘Paper Business’ theme, it’s time to bring in the slider. Today, we will build and implement a jQuery slider plugin into WordPress, style it properly, and discuss how we will pull out the information from the admin panel. Let’s get our slide on!

Created by Drew Douglass.

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Continuing on with our OOP review, we’ll begin to build a real-world database abstraction class. We’ll review the __construct magic method, as well as the mysqli object.

Created by Jeffrey.

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Created by tkadom

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Ernerst Ellingston gave a presentation to the Atlanta ruby user group on the essentials of jQuery in tutorial style. Created by tkadom

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Continuing with our OOP review, today, we’ll create a very simple “calculator” class that should give you a better idea of how abstracting your code to its own class can save you a great deal of time. We’ll also take a look at the helpful “__construct” method, as well as creating variables. Enjoy!

Created by Jeffrey.

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For those who are attending Google I/O 2009 (http://code.google.com/io/), these video are an opportunity to hear from some of the speakers in advance. The speakers introduce their topic and provide a preview of one or more topics that will be covered in their talks.

In this session, learn advanced Javascript, why App Engine is so easy to develop on, protecting from XSRF vulnerabilities, cutting the load time of your app in half, and hear about general client-side web app techniques. These lessons are taught in the context of the design and development of the AJAX API Playground (http://code.google.com/apis/ajax/playground/), a tool which can help developers learn about and experiment with many of Google's APIs.

Ben Lisbakken

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Summary

jQuery is a JavaScript library which allows you to develop solutions with less code, in less time. You can build interactive prototypes for your prospective clients, or take an existing solution and add new dynamic behaviour with very little effort.

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