Measuring the visual experience of website performance
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This document discusses different methods for measuring website performance from both a synthetic and real-user perspective. It introduces the Speed Index metric for quantifying visual progress and compares the Speed Index of Amazon and Twitter. It also covers the Chrome resource prioritization and different challenges around visual performance metrics.
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腾讯大讲堂09 如何建设高性能网站
The document discusses techniques for optimizing front-end web performance. It provides examples of how much time is spent loading different parts of top websites, both with empty caches and full caches. The "performance golden rule" is that 80-90% of end-user response time is spent on the front-end. The document also outlines Yahoo's 14 rules for performance optimization, which include making fewer HTTP requests, using content delivery networks, adding Expires headers, gzipping components, script and CSS placement, and more.
Maximizing Optimizely Website Performance
This document discusses best practices for optimizing Optimizely performance, including:
1. Implementing the Optimizely snippet synchronously before other tags to avoid flashing and integration issues.
2. Using a content delivery network to deliver the snippet for fast loading.
3. Understanding the order of execution for Optimizely experiments to ensure proper prioritization and evaluation.
4. Avoiding common issues that can cause flashing like using regular JavaScript in experiments.
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More from Patrick Meenan
Resource Prioritization
This document discusses resource prioritization strategies to optimize loading performance. It explains that the browser processes resources sequentially and blocks on certain resource types. It then provides recommendations for developers to inform the browser of dependencies and priorities through techniques like preloading. The document also analyzes HTTP/1.x versus HTTP/2 prioritization and compares performance of loading scripts and fonts with different approaches. It evaluates tools for testing prioritization and discusses why prioritization can fail or appear broken. Finally, it offers suggestions for servers and networks to better support prioritization.
HTTP/2 Prioritization
This document discusses HTTP/2 prioritization and how resources are prioritized during loading. It begins by explaining how browsers prioritize different resource types during parsing and rendering. It then covers how HTTP/2 allows all requests to be sent immediately to the server with priority specifications, as opposed to HTTP/1.x which limits connections. The document concludes by discussing challenges with prioritization across connections and various tools for testing prioritization.
Getting the most out of WebPageTest
This document discusses how to get the most out of the webpagetest.org tool for testing website performance. It provides an overview of the metrics webpagetest measures like load times, bandwidth usage, and script execution. The document also shares links to examples of using scripting commands to test service workers and customizing domain names. Additionally, it promotes Patrick Meenan's GitHub projects for Cloudflare Workers that can optimize sites and mentions the bulk testing feature on webpagetest.org.
Http2 in practice
Slides from Velocity 2019 tutorial on HTTP/2. Covers prioritization in the browser, network and server and tuning of HTTP/2.
Resource loading, prioritization, HTTP/2 - oh my!
The document discusses key aspects of resource loading and prioritization on the web, including:
1. The HTML parser stops for non-async scripts until previous CSS is downloaded and the script is parsed and executed, but does not pause for CSS or image loading.
2. Resources can only be loaded once discovered by the parser or layout; optimal ordering prioritizes render-blocking and parser-blocking resources first using full bandwidth.
3. HTTP/2 allows for prioritization of resources from a single domain, while priority hints and preloading help prioritize cross-domain assets.
How fast is it?
This document discusses various metrics for measuring website speed and performance. It outlines different technical, visual, and interactive metrics and explains considerations for synthetic versus real-user measurement. Key recommendations include using First Contentful Paint, Speed Index from synthetic tests and First Interactive for real-user measurement to track progress towards performance goals. Effective connection type distribution from real-user data should also be considered to ensure optimizations work for all users.
Machine Learning RUM - Velocity 2016
Presentation from Velocity 2016 on using Machine Learning to determine the metrics that drive bounce and conversions
TLS - 2016 Velocity Training
This document summarizes a presentation on debugging front-end performance related to TLS and HTTPS. It discusses optimizing the TLS handshake to reduce round trips, using session resumption, OCSP stapling, TLS false start, and dynamic record sizing. It also covers TLS debugging tools like istlsfastyet.com and security headers like HSTS, CSP, and HPKP. The presentation aimed to provide practical techniques and checks to improve TLS performance in practice.
Service workers - Velocity 2016 Training
This document summarizes a presentation on debugging front-end performance using service workers. Service workers allow intercepting and responding to network requests and caching assets. They also support features like push notifications, offline access, and progressive web apps. The presentation covered how service workers work, common use cases like handling errors, CDN failover and prefetching, as well as future possibilities like drawing images locally and custom compression.
Measuring performance - Velocity 2016 Training
This document discusses various methods for measuring front-end performance, including synthetic testing, active testing, real user measurement, and measuring the visual experience. Synthetic testing provides consistent results but may not reflect actual user performance, while real user measurement captures real user experiences but with limited detail. The document also covers specific tools like Navigation Timing, Resource Timing, User Timing, SpeedIndex, and services from companies like Soasta, New Relic, and WebPageTest that can help with performance measurement.
Mobile web performance - MoDev East
This document summarizes a presentation on high performance mobile web. The presentation covers:
- Delivering fast mobile experiences by making fewer HTTP requests, using CDNs, browser prefetching, and other techniques.
- Measuring web performance using Navigation Timing, Resource Timing, custom timing marks, and tools like WebPagetest and Google Analytics.
- Typical mobile network performance statistics like average latency, download speeds, and how these numbers impact page load times.
Image optimization
This document discusses techniques for optimizing image delivery on web pages. It recommends delay-loading hidden images, using lazy-loading attributes, delivering progressive JPEGs that display at lower quality first before higher quality, and using tools to convert images to progressive format to improve perceived page load speeds. Examples and links are provided to demonstrate how progressive JPEGs can display portions of images faster than regular JPEGs during loading.
Google I/O 2012 - Protecting your user experience while integrating 3rd party...
The amount of 3rd-party content included on websites is exploding (social sharing buttons, user tracking, advertising, code libraries, etc). Learn tips and techniques for how best to integrate them into your sites without risking a slower user experience or even your sites becoming unavailable.
Video is available here: http://www.youtube.com/watch?v=JB4ulhFFdH4&feature=plcp
Velocity 2012 - Taming the Mobile Beast
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Frontend SPOF
The document discusses the frontend single point of failure (SPOF) problem caused by blocking JavaScript and CSS files. It provides examples of popular websites, code libraries, widgets, and content management systems that contribute to frontend SPOFs. The document recommends solutions for browsers, widget owners, CMS developers, and site owners to address this issue through asynchronous loading of resources and better monitoring of frontend performance.
Hands on performance testing and analysis with web pagetest
WebPagetest is a tool that tests the performance of web pages from multiple locations worldwide with configurable connectivity settings. It provides metrics like page speed scores, timings, bytes transferred, and screenshots. Key features include blocking content to test impact on performance, and scripting to automate testing of rich applications. The tool has a REST API for automating tests and integrating with other tools.
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The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
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DeFi represents a paradigm shift in the financial industry. Instead of relying on traditional, centralized institutions like banks, DeFi leverages blockchain technology to create a decentralized network of financial services. This means that financial transactions can occur directly between parties, without intermediaries, using smart contracts on platforms like Ethereum.
In 2024, we are witnessing an explosion of new DeFi projects and protocols, each pushing the boundaries of what’s possible in finance.
In summary, DeFi in 2024 is not just a trend; it’s a revolution that democratizes finance, enhances security and transparency, and fosters continuous innovation. As we proceed through this presentation, we'll explore the various components and services of DeFi in detail, shedding light on how they are transforming the financial landscape.
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Ready to take your DeFi project to the next level? Partner with Intelisync for expert DeFi development services today!
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Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
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Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...
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This video focuses on integration of Salesforce with Bonterra Impact Management.
Interested in deploying an integration with Salesforce for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Programming Foundation Models with DSPy - Meetup Slides
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TrustArc Webinar - 2024 Global Privacy Survey
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
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5th LF Energy Power Grid Model Meet-up Slides
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
JavaLand 2024: Application Development Green Masterplan
My presentation slides I used at JavaLand 2024
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
- Step-by-step guide on deploying anomaly detection models on edge devices using ArgoCD.
5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
- Learn how to view and analyze Kafka messages stored in a data lake for better insights.
7. What is Prometheus?
- Get to know Prometheus, an open-source monitoring and alerting toolkit, and its application in monitoring edge devices.
8. Monitoring Application Metrics with Prometheus
- Detailed instructions on setting up Prometheus to monitor the performance and health of your anomaly detection system.
9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
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Measuring the visual experience of website performance
- 1. Measuring the visual experience of website performance Patrick Meenan Google @patmeenan pmeenan@webpagetest.org
- 2. How fast is your site?
- 3. Base page monitoring • Measures just the HTML response • How fast the server responded • Largely for operational monitoring/back-end optimization • Curl, wget, nagios, pingers, etc
- 4. Full Page (synthetic) • Full browser • Measures to onLoad
- 5. Full Page (RUM) • Real-user data from the field • Measures to onLoad • Possibility for per-application specific measurement points – Time to first tweet
- 6. Examples
- 7. Twitter onLoad (2.4s) Twitter end of activity (8.2s)
- 10. 2 Pages, Identical Performance http://youtu.be/Ipk1k_IobYg
- 11. 2 Pages, Identical Performance http://youtu.be/Ipk1k_IobYg
- 12. Start Render Identical
- 13. Load Time Identical
- 14. Last Visual Change Identical
- 15. Introducing the Speed Index
- 19. The Speed Index The user experience of A was 7.4 times faster than B sites.google.com/a/webpagetest.org/docs/using-webpagetest/metrics/speed-index
- 20. Amazon vs. Twitter Amazon Twitter Speed Index 1501 6014 (+300%) onload 2.4 2.4 Fully Loaded 6.4 8.2 (+28%) www.webpagetest.org/video/view.php?id=120414_22f2206da973b41621c499e2be01d555cdac6ab0&bare=1
- 24. PageSpeed Service www.webpagetest.org/compare
- 26. Chrome resource prioritization First Paint insouciant.org/tech/throttling-subresources-before-first-paint/
- 27. Chrome resource prioritization … insouciant.org/tech/throttling-subresources-before-first-paint/
- 28. Visual Progress
- 29. Move Along, There’s Nothing to See Here… http://www.flickr.com/photos/danacea/2452567718/
- 30. Sensitivities to avoid • Small visual changes causing large measured differences – Pixels move (Layout Changes)
- 31. As-Implemented - Histograms • Fixed End point (Fully loaded) • Per-color histograms of color distribution across the page – Pixel locations irrelevant – Works “well enough” – Minimal memory required • Starting Histogram and Final Histogram captured • Diff from Start to Final • Each Video frame: – Diff against start – Compare to Diff from Final (calculate as %)
- 32. Lab-Only http://www.flickr.com/photos/rmtip21/4788073408/
- 34. RUM Possibilities • Measure time of individual DOM elements • Measure paint events • Requires browser enhancements
- 36. Interstitials
- 37. Backgrounds
- 38. Slideshows
- 39. Ads