| Autore |
Edgar Matthew
|
| Edizione | [1st ed. 2024.] |
| Pubbl/distr/stampa |
Berkeley, CA : , : Apress : , : Imprint : Apress, , 2024
|
| Descrizione fisica |
1 online resource (246 pages)
|
| Disciplina |
006.76
|
| Soggetto topico |
Web site development
Application software - Development
High performance computing
Application software - Design
|
| ISBN |
979-88-6880-155-6
|
| Formato |
Materiale a stampa  |
| Livello bibliografico |
Monografia |
| Lingua di pubblicazione |
eng
|
| Nota di contenuto |
Intro -- Table of Contents -- About the Author -- Introduction -- Part I: Initial Connection -- Chapter 1: DNS Lookup Time -- What DNS Lookup Time Measures -- DNS Resolution Steps -- How a Visitor's Geographic Location Affects DNS Lookup Time -- DNS TTL: IP Address Cache Duration -- Optimal DNS TTL Value -- Implications of Third-party Resources -- Measuring DNS Lookup Time -- DNS Lookup Time Benchmarks -- Global DNS Lookup Time: DNS Speed Benchmark -- Domain Connections: WebPageTest -- Dig Test: DiG GUI -- Ways to Improve DNS Lookup Time -- Select Faster DNS Provider -- Prefetch Third-Party Domains: dns-prefetch and preconnect -- Recap: When to Use DNS Lookup Time -- Chapter 2: Time to First Byte (TTFB) -- What Time to First Byte Measures -- Process Before the Server Sends the First Byte -- How Servers Build a Response -- How Redirects Impact TTFB -- Scenario 1: Redirect Destination URL on the Same Domain -- Scenario 2: Redirect Destination URL on Another Domain -- Implications of Third-party Resources -- Measuring Time to First Byte -- TTFB Benchmarks -- TTFB by Location: KeyCDN Performance Test -- TTFB Details: Byte Check -- TTFB Additional Details: WebPageTest -- Ways to Improve Time to First Byte -- Caching Internal Resources -- Choose Faster Hosting Provider -- Recap: When to Use Time to First Byte -- Part II: Displaying the Page -- Chapter 3: DOMContentLoaded Time -- What DOMContentLoaded Measures -- HTML Parsing -- Document Object Model (DOM) -- How CSS Affects Parsing -- How JavaScript Affects Parsing -- Measuring DOMContentLoaded -- DCL Time Benchmarks -- DOM Size Benchmarks -- Browser Timings: GTmetrix -- DOM Elements: PageSpeed Insights -- DOM Nodes: Google Chrome DevTools -- Ways to Improve DOMContentLoaded -- HTML Reduction -- Changing How JavaScript Loads: Async and Defer -- Asynchronous Loading -- Deferring JavaScript Load.
Recap: When to Use DOMContentLoaded -- Chapter 4: Total Requests and Transfer Size -- What Total Requests and Transfer Size Measure -- Requested File Types -- Fetch Priority -- Compression -- How Images Are Compressed -- How Other Files Are Compressed -- Measuring Total Requests and Transfer Size -- Total Request Benchmarks -- Transfer Size Benchmarks -- Transfer Size and Resource Size: Chrome DevTools -- Total Requests by Type: WebPageTest -- Ways to Improve Total Requests and Transfer Size -- Consolidating Multiple JavaScript or CSS Files -- Domain Sharding and Third-Party Hosts -- Make the Files Smaller: Minification -- When to Use Total Requests and Transfer Size -- Chapter 5: First Contentful Paint -- What First Contentful Paint Measures -- Critical Rendering Path -- CSS Object Model (CSSOM) and Style Calculation -- Layout and Reflow -- Content Evaluated by FCP -- Related Metrics: Start Render and First Paint -- How Fonts Affect Painting -- Measuring First Contentful Paint -- FCP Benchmarks -- Visualizing FCP: GTmetrix and WebPageTest -- Critical Rendering Path Details: Chrome DevTools -- Ways to Improve First Contentful Paint -- Font Loading: Avoiding FOIT and FOUT -- Lazy Load: Image and Iframe -- When to Use First Contentful Paint -- Part III: Completing the Website Load -- Chapter 6: Time to Interactive and Total Blocking Time -- What Time to Interactive and Total Blocking Time Measure -- Main Thread -- Defining Long Task and Task Blocking Time -- Visitor Interactions When the Main Thread Is Blocked -- When TTI Occurs -- Comparing Importance: TTI vs. TBT -- Measuring Time to Interactive and Total Blocking Time -- TBT and TTI Benchmarks -- Visualize TTI: GTmetrix Speed Visualization -- Main Thread Processing: WebPageTest -- Find Long Tasks: Chrome DevTools -- Ways to Improve Total Blocking Time and Time to Interactive.
Simplify Layout Calculation and Painting: Avoid Layout Thrashing -- Move Work Off the Main Thread: Web Workers -- When to Use Total Blocking Time and Time to Interactive -- Chapter 7: Total Load: Onload Time, Fully Loaded Time, Speed Index -- What Do Onload Time, Fully Loaded Time, and Speed Index Measure -- Onload Time and Dependent Resources -- Fully Loaded Time and Network Idle Time -- Speed Index and Visually Complete -- Determining When the Website Finishes Loading -- Measuring Total Load Metrics -- Onload Time Benchmarks -- Fully Loaded Time Benchmarks -- Speed Index Benchmarks -- Onload and Fully Loaded Time: GTmetrix -- Speed Index and Visual Progress: WebPageTest -- Ways to Improve Total Load Time -- Progress Indicators Improve Perception of Speed -- Recap: When to Use Total Load Metrics -- Part IV: Core Web Vitals -- Chapter 8: Largest Contentful Paint -- What Largest Contentful Paint Measures -- Viewport and First Viewport -- Defining "Largest" -- How LCP Compares to FCP -- When LCP Occurs -- Measuring Largest Contentful Paint -- LCP Benchmarks -- Identify LCP Element: WebPageTest -- Measuring Visitor Viewport Size: GA4 -- Ways to Improve Largest Contentful Paint -- Preload LCP Elements -- Use Faster Image Formats: WebP and AVIF -- Recap: When to Use Largest Contentful Paint -- Chapter 9: Cumulative Layout Shift -- What Cumulative Layout Shift Measures -- Shifting Elements -- Layout Shift -- Layout Shifts That Are Not Evaluated -- Expected vs. Unexpected Shifts -- How Layout Shifting Is Scored -- Session Windows -- How CLS Relates to Speed -- Measuring Cumulative Layout Shift -- CLS Benchmarks -- Identify What Shifts and Session Windows: WebPageTest -- Find Shifting Element Coordinates and Viewport Size: Chrome DevTools -- Ways to Improve Cumulative Layout Shift -- Identify Late-Running JavaScript Files -- Reserve Space.
Recap: When to Use Cumulative Layout Shift -- Chapter 10: Interaction to Next Paint -- What Interaction to Next Paint Measures -- Events and Event Handler Code -- Interaction Process -- Measuring Interactions -- How INP Relates to FID -- How INP Relates to the DOM -- How INP Compares to Total Blocking Time and Time to Interactive -- Measuring Interaction to Next Paint -- INP Benchmarks -- Simulate Interactions: DebugBear's INP Profiler -- Breakdown INP: Web Vitals Extension -- Find Event Handler Code: Firefox DevTools -- Ways to Improve Interaction to Next Paint -- Processing Time: Improve Event Handler Code -- Presentation Delay: Optimize Animations -- Recap: When to Use Interaction to Next Paint -- Chapter 11: Conclusion: Choosing Website Speed Metrics -- Summary -- Appendix A: Metrics Recap -- Regular Monitoring -- Core Web Vitals - SEO and UX -- Speed KPIs -- Deeper Diagnostic -- For General Communication -- Appendix B: PageSpeed Insights -- Field Data -- Lab Data -- Opportunities and Diagnostics -- Appendix C: References and Additional Information -- Chapter 1 -- Chapter 2 -- Chapter 3 -- Chapter 4 -- Chapter 5 -- Chapter 6 -- Chapter 7 -- Chapter 8 -- Chapter 9 -- Chapter 10 -- Appendix B -- Index.
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| Record Nr. | UNINA-9910838270803321 |
Info
Speed Metrics Guide [[electronic resource] ] : Choosing the Right Metrics to Use When Evaluating Websites / / by Matthew Edgar
