Beautiful and Fast Images
•Download as PPTX, PDF•
0 likes•671 views
This document discusses optimizing images and video for fast delivery on mobile devices. It begins by outlining how delays in loading content can negatively impact users and business metrics. It then provides recommendations for optimizing four aspects of images: quality, format, sizing, and lazy loading. Specific techniques are presented for each along with data showing their real-world impact. Video delivery optimization is also covered, including strategies to improve startup times. The document concludes by stating that images and video can be both beautiful and fast with the right optimizations.
More Related Content
What's hot
What's hot (20)
Similar to Beautiful and Fast Images
Similar to Beautiful and Fast Images (14)
More from Doug Sillars
More from Doug Sillars (20)
Recently uploaded
Recently uploaded (20)
Beautiful and Fast Images
- 2. Delivering Beautiful and Fast Images and Video Doug Sillars @DougSillars FrontCon June 15, 2018
- 4. 0.5 0.6 0.7 0.8 0.9 Standing in Line Standing on the edge of a virtual cliff Experiencing Mobile Delays Solving a Math Problem https://www.ericsson.com/res/docs/2016/mobility-report/emr-feb-2016-the-stress-of-steaming-delays.pdf Stress
- 5. Large Downloads Induce Delays in Rendering 3s: 53% of Users Abandon Mobile Sites 500ms: 26% Frustration 8% Engagement 100ms: 1% Revenue Walmart & Amazon (Desktop 2001) 4% Mobile Users Throw Their Phones https://www.doubleclickbygoogle.com/articles/mobile-speed-matters http://bit.ly/mobileWebStress http://www.globaldots.com/how-website-speed-affects-conversion-rates/ https://www.mobilejoomla.com/blog/172-responsive-design-vs-server-side-solutions-infographic.html
- 6. Images & Video make up 75% of Web Content HTTPArchive mobile websites 15/02/18
- 7. 4 Simple Image Optimizations
- 8. 4 Simple Image Optimizations 1. Quality 2. Format 3. Sizing 4. Lazy Loading
- 9. 4 Simple Image Optimizations 1. Quality 2. Format 3. Sizing 4. Lazy Loading
- 10. 4 Simple Image Optimizations Httparchive.org Webpagetest.org
- 11. 4 Simple Image Optimizations 1. Quality 2. Format 3. Sizing 4. Lazy Loading
- 12. Image Quality Lossy Image size is reduced by removing pixel information https://developers.google.com/speed/docs/insights/OptimizeImages
- 13. Image Quality magick -quality 85 riga.jpg riga85.jpg http://res.cloudinary.com/dougsillars/image/upload/q_85/v1520504964/IMG_20180301_114117_tzasan.jpg Lighthouse: Recommends 85% quality on all images https://developers.google.com/speed/docs/insights/OptimizeImages
- 14. Image Quality Use “In The Wild” 500,000 mobile sites Analyzed 3/15/18
- 15. Image Quality Use “In The Wild” Median Savings (50th percentile): • 2.83 seconds faster page load • 419KB less data
- 22. Automate Quality vs. File Size • Butteraugli • SSIM: Structural SIMilarity https://github.com/technopagan/cjpeg-dssim cjpeg-dssim jpegoptim riga.jpg http://res.cloudinary.com/dougsillars/image/upload/q_auto/v1529005982/IMG_20180614_184507_ssuk1i.jpg
- 25. Results: • Test Load on Motorola G4:
- 26. 4 Simple Image Optimizations 1. Quality 2. Format 3. Sizing 4. Lazy Loading
- 27. Image Formats – Average Size HTTPArchive mobile websites 15/02/18
- 28. Image Formats – Average Size HTTPArchive mobile websites 15/02/18
- 29. Scalable Vector Graphics (SVG)
- 30. Scalable Vector Graphics (SVG)
- 31. Scalable Vector Graphics (SVG) https://github.com/google/brotli
- 32. Image Formats – Average Size HTTPArchive mobile websites 15/02/18
- 34. SSIM + WebP 986 KB http://res.cloudinary.com/dougsillars/image/upload/q_auto,f_auto/v1529005982/IMG_20180614_184507_
- 35. File Format: Web <picture> <source width = "100%" type="image/webp" srcset=”riga.webp"> <img width = "100%" src=”riga_cjpeg_dssim.jpg" alt=”Riga, Latvia"> </picture>
- 36. Image Format Use “In The Wild” 500,000 mobile sites Analyzed 3/15/18
- 37. Image Format Use “In The Wild” 500,000 mobile sites Analyzed 3/15/18
- 38. 4 Simple Image Optimizations 1. Quality 2. Format 3. Sizing 4. Lazy Loading
- 39. Image Sizing -
- 40. Image Sizing
- 41. Image Sizing -
- 43. Image Sizing 624 832 12,979,000 pixels 519,000 pixels _________________ - 12,460,000 pixels
- 44. Image Sizing 624 832 12,979,000 pixels 519,000 pixels _________________ - 12,460,000 pixels
- 46. Image Sizing - Responsive Images: Generate a set of images 25 KB difference in size
- 47. Responsive Images 624 832 625,000 pixels - 106,000 pixels 519,000 pixels _________________
- 52. Responsive Images Use “In The Wild” 500,000 mobile sites Analyzed 3/15/18
- 53. Responsive Images Use “In The Wild” 442,000 mobile sites Analyzed 3/15/18
- 54. 4 Simple Image Optimizations 1. Quality 2. Format 3. Sizing 4. Lazy Loading
- 58. Lazy Loading Use “In The Wild” 442,000 mobile sites Analyzed 3/15/18
- 59. Lazy Loading Use “In The Wild” 442,000 mobile sites Analyzed 3/15/18
- 61. Preview Images
- 62. Optimizing Content Delivery Preview Images https://github.com/technopagan/sqip
- 63. Preview Images
- 65. Animated GIFs
- 66. Animated GIFs Animated GIF 3.8 MB 270% larger
- 67. Animated GIFs
- 68. Animated GIFs MP4: 256 colors 247KB 93% smaller
- 69. Animated GIFs Video Tags: Video is not pre-loaded, will be last to download <video loop autoplay muted playsinline controls = "false” src="goats.mp4”/> Img tags are fast! <picture> <source type="video/mp4" srcset=”goats.mp4"> <source type="image/webp" srcset=”goats.webp"> <img src=”goats.gif"> </picture> https://calendar.perfplanet.com/2017/animated-gif-without-the-gif/
- 70. Animated GIFs
- 71. Video
- 72. 72 Video Buffer Rage: a state of uncontrollable fury or violent anger induced by delayed or interrupted streaming video content http://www.ineoquest.com/press-releases/new-research-reveals-buffer-rage-as-techs-newest-epidemic
- 73. Video Quality Metrics 1.Does the Video Start? 2.Does the Video Stall? 3.Does it Look Good?
- 75. Video Startup Conviva creen_Streaming_TV_Census_Report_FINAL.pdf Q1 2018: Video Startup 16.9B total Video plays 400M Fail to Start 2B Abandoned before Start ~800M hours of video playback lost
- 76. Video Startup Conviva creen_Streaming_TV_Census_Report_FINAL.pdf Q1 2018: Video Startup 16.9B total Video plays 400M Fail to Start 2B Abandoned before Start ~800M hours of video playback lost
- 77. Video Fails To Start
- 79. Video Startup Conviva creen_Streaming_TV_Census_Report_FINAL.pdf Q1 2018: Video Startup 16.9B total Video plays 400M Fail to Start 2B Abandoned before Start
- 80. Video Startup Conviva creen_Streaming_TV_Census_Report_FINAL.pdf Q1 2018: Video Startup Average Video Start Time: N. America: 4.91s Asia: 3.00s Europe: 4.30s
- 81. Video Startup Delay After 2 seconds, every additional second corresponds to 5.8% increase in abandonment https://www.akamai.com/kr/ko/multimedia/documents/technical-publication/video-stream-quality-impacts-viewer-behavior-inferring-causality-using-quasi-experimental-designs-technical-publication.pdf
- 86. Preload When It Makes Sense Ad Playback Video Download
- 87. Preload When It Makes Sense Ad Playback Video Download
- 88. Preload When It Makes Sense Ad Playback Video Download
- 89. ...be Careful with Preload Preload = “auto”
- 90. …be Careful with Preload
- 91. Optimizing Video Delivery What Leads to Startup Delay? Manifest File: List of Available Streams Player Chooses a Stream Stream Manifest: List of Video Segments Player Downloads Segments into buffer Video Plays
- 92. Optimizing Video Delivery What Leads to Startup Delay? Example Manifest file:
- 93. Optimizing Video Delivery Video Streaming Manifest File: List of Available Streams Player selects 8.5 MBPS stream Stream Manifest: List of Video Segments Buffer takes a long time to fill Video Does Not Play Player immediately changes the stream choice to 192 KBPS
- 94. Video Startup
- 95. Optimizing Video Delivery What Leads to Startup Delay? Example Manifest file:
- 96. Optimizing Video Delivery What Leads to Startup Delay? Example Manifest file:
- 97. Video Startup
- 98. Video Startup
- 99. Video Startup
- 100. Video Startup 10s 11s 12s 13s 14s 15s 16s 17s 4k Low->High: 4K Middle: 4k:High->Low:
- 101. Video Startup “In the Wild” 75% 20% 5% https://dougsillars.com/2018/03/29/streaming-video-whats-on-the-web-today/
- 102. Optimizing Content Delivery Balancing the Network with Playback Player uses available streams to balance download with playback
- 103. Optimizing Content Delivery Video Streaming
- 104. Optimizing Content Delivery Video Streaming Large throughput gaps can lead to many stream changes – which can be visible to user
- 105. Summary Testing: WebPageTest https://www.webpagetest.org HttpArchive https://httparchive.org Images: ImageMagick https://www.imagemagick.org SSIM https://github.com/technopagan/cjpeg-dssim LazySizes https://github.com/aFarkas/lazysizes Responsive Breakpoints http://www.responsivebreakpoints.com/ Cloudinary https://www.cloudinary.com Tooling
- 106. Conclusion Images and Video can be Beautiful AND Fast
- 107. Contest – Win a €100 Amazon Gift Card Optimize Images for Fast Page Load Submit your entry by June 21 for a chance to win! Code and tips: https://github.com/dougsillars/dougsillars.github.io Entry form: http://bit.ly/FastImages https://dougsillars.github.io
Editor's Notes
- 47% smaller!
- 1149 bytes, 700 Zipped
- 1149 bytes, 700 Zipped
- 1149 bytes, 700 Zipped
- 47% smaller! Or 65% smaller from original!
- file:///Users/demo/Documents/reponsiveimages.html