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Improving Performance with Responsive Images [j...

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March 15, 2014
Programming
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Improving Performance with Responsive Images [jQueryTO]

jQueryTO
March 15, 2014
https://github.com/nwtn/pres-respimg-perf-jqueryto

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newtron

March 15, 2014
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Transcript

  1. None

  2. Improving Performance with Responsive Images jQueryTO March 15, 2014

  3. https://github.com/nwtn/
 pres-respimg-perf-jqueryto

  4. “Good performance is good design” Brad Frost

  5. None
  6. None

  7. bradfrostweb.com

  8. “More human beings today have access to a cellphone than

    the United Nations says have access to a clean toilet.” Anand Giridharadas, New York Times, April 10 2010

  9. “More human beings today have access to a cellphone than

    the United Nations says have access to a clean toilet.” Anand Giridharadas, New York Times, April 10 2010

  10. bradfrostweb.com

  11. bradfrostweb.com

  12. 1.A flexible, grid-based layout, 2.Flexible images and media, 3.Media queries,

    a module from the CSS3 specification

  13. 1.A flexible, grid-based layout, 2.Flexible images and media 3.Media queries,

    a module from the CSS3 specification

  14. img { max-width: 100%; }

  15. None
  16. None

  17. A solution Serve one big image and let the browser

    scale it
  18. None
  19. None
  20. None

  21. Average web page size: 1,703 KB.
 
 
 Images account

    for 1,063 KB,
 over 62% of total.
 
 HTTP Archive, March 1 2014

  22. 2x resolution = 4x as many pixels

  23. energy more pixels = more money time

  24. “Good performance is good design” Brad Frost

  25. A better solution Serve an appropriately-sized image to each user

  26. Responsive Images

  27. None
  28. None
  29. None
  30. None

  31. SVG, WebP, JPEG XR

  32. <picture> + srcset:
 http://picture.responsiveimages.org/ Mozilla: Q1
 Blink (Chrome/Opera): Soon
 Webkit

    (Apple, etc.): Also soon?
 MS: ?

  33. <picture> + srcset:
 http://picture.responsiveimages.org/ Mozilla Q1
 Blink (Chrome/Opera) Soon
 Webkit

    (Apple, etc.) Also soon?
 MS ?

  34. Client Hints:
 http://tools.ietf.org/html/draft-grigorik-http-client-hints-01

  35. None

  36. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  37. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  38. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  39. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  40. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  41. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  42. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>

  43. <picture> <!-- art directed sources --> <source media="(min-width: 45em)" src="large.jpg"

    /> <source media="(min-width: 18em)" src="med.jpg" /> ! <!-- fallback --> <img src="small.jpg" alt="A rad wolf" /> </picture>
  44. None

  45. <picture> <!-- sources @ different resolutions --> <source srcset="pic1x.jpg 1x,

    pic2x.jpg 2x, pic4x.jpg 4x" /> ! <!-- fallback --> <img src="pic1x.jpg" alt="A rad wolf" /> </picture>

  46. <picture> <!-- sources @ different resolutions --> <source srcset="pic1x.jpg 1x,

    pic2x.jpg 2x, pic4x.jpg 4x" /> ! <!-- fallback --> <img src="pic1x.jpg" alt="A rad wolf" /> </picture>

  47. <picture> <!-- sources @ different resolutions --> <source srcset="pic1x.jpg 1x,

    pic2x.jpg 2x, pic4x.jpg 4x" /> ! <!-- fallback --> <img src="pic1x.jpg" alt="A rad wolf" /> </picture>

  48. <picture> <!-- sources @ different resolutions --> <source srcset="pic1x.jpg 1x,

    pic2x.jpg 2x, pic4x.jpg 4x" /> ! <!-- fallback --> <img src="pic1x.jpg" alt="A rad wolf" /> </picture>

  49. <picture> <!-- sources @ different resolutions --> <source srcset="pic1x.jpg 1x,

    pic2x.jpg 2x, pic4x.jpg 4x" /> ! <!-- fallback --> <img src="pic1x.jpg" alt="A rad wolf" /> </picture>

  50. <picture> <!-- sources @ different resolutions --> <source srcset="pic1x.jpg 1x,

    pic2x.jpg 2x, pic4x.jpg 4x" /> ! <!-- fallback --> <img src="pic1x.jpg" alt="A rad wolf" /> </picture>
  51. None

  52. <img srcset="pic1x.jpg 1x, pic2x.jpg 2x, pic4x.jpg 4x" src="pic1x.jpg" alt="A rad

    wolf" />

  53. <img srcset="pic1x.jpg 1x, pic2x.jpg 2x, pic4x.jpg 4x" src="pic1x.jpg" alt="A rad

    wolf" />

  54. <img srcset="pic1x.jpg 1x, pic2x.jpg 2x, pic4x.jpg 4x" src="pic1x.jpg" alt="A rad

    wolf" />

  55. <img srcset="pic1x.jpg 1x, pic2x.jpg 2x, pic4x.jpg 4x" src="pic1x.jpg" alt="A rad

    wolf" />

  56. <img srcset="pic1x.jpg 1x, pic1.5x.jpg 1.5x, pic2x.jpg 2x, pic4x.jpg 4x" src="pic1x.jpg"

    alt="A rad wolf" />
  57. None

  58. <picture> <source media="(min-width: 45em)" srcset="large1.jpg 1x, large2.jpg 2x" /> <source

    media="(min-width: 18em)" srcset="med1.jpg 1x, med2.jpg 2x" /> <source srcset="small1.jpg 1x, small2.jpg 2x" /> <img src="small1.jpg" alt="A rad wolf" /> </picture>

  59. <picture> <source media="(min-width: 45em)" srcset="large1.jpg 1x, large2.jpg 2x" /> <source

    media="(min-width: 18em)" srcset="med1.jpg 1x, med2.jpg 2x" /> <source srcset="small1.jpg 1x, small2.jpg 2x" /> <img src="small1.jpg" alt="A rad wolf" /> </picture>

  60. <picture> <source media="(min-width: 45em)" srcset="large1.jpg 1x, large2.jpg 2x" /> <source

    media="(min-width: 18em)" srcset="med1.jpg 1x, med2.jpg 2x" /> <source srcset="small1.jpg 1x, small2.jpg 2x" /> <img src="small1.jpg" alt="A rad wolf" /> </picture>

  61. <picture> <source media="(min-width: 45em)" srcset="large1.jpg 1x, large2.jpg 2x" /> <source

    media="(min-width: 18em)" srcset="med1.jpg 1x, med2.jpg 2x" /> <source srcset="small1.jpg 1x, small2.jpg 2x" /> <img src="small1.jpg" alt="A rad wolf" /> </picture>

  62. <picture> <source media="(min-width: 45em)" srcset="large1.jpg 1x, large2.jpg 2x" /> <source

    media="(min-width: 18em)" srcset="med1.jpg 1x, med2.jpg 2x" /> <source srcset="small1.jpg 1x, small2.jpg 2x" /> <img src="small1.jpg" alt="A rad wolf" /> </picture>

  63. <picture> <source media="(min-width: 45em)" srcset="large1.jpg 1x, large2.jpg 2x" /> <source

    media="(min-width: 18em)" srcset="med1.jpg 1x, med2.jpg 2x" /> <source srcset="small1.jpg 1x, small2.jpg 2x" /> <img src="small1.jpg" alt="A rad wolf" /> </picture>
  64. None

  65. <picture> <source sizes="100%" srcset="pic400.jpg 400w, pic800.jpg 800w, pic1600.jpg 1600w" />

    ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>

  66. <picture> <source sizes="100%" srcset="pic400.jpg 400w, pic800.jpg 800w, pic1600.jpg 1600w" />

    ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>

  67. <picture> <source sizes="100%" srcset="pic400.jpg 400w, pic800.jpg 800w, pic1600.jpg 1600w" />

    ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>

  68. <picture> <source sizes="100%" srcset="pic400.jpg 400w, pic800.jpg 800w, pic1600.jpg 1600w" />

    ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>

  69. <picture> <source sizes="100%" srcset="pic400.jpg 400w, pic800.jpg 800w, pic1600.jpg 1600w" />

    ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>

  70. <picture> <source sizes="100%" srcset="pic400.jpg 400w, pic800.jpg 800w, pic1600.jpg 1600w" />

    ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>
  71. None

  72. <picture> <source sizes="(min-width: 45em) 33%, (min-width: 18em) 50%, 100%" srcset="pic400.jpg

    400w, pic800.jpg 800w, pic1600.jpg 1600w" /> ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>

  73. <picture> <source sizes="(min-width: 45em) 33%, (min-width: 18em) 50%, 100%" srcset="pic400.jpg

    400w, pic800.jpg 800w, pic1600.jpg 1600w" /> ! <img src="pic400.jpg" alt="A rad wolf" /> </picture>
  74. None

  75. <picture> <source type="image/webp" src="wolf.webp" /> <img src="wolf.jpg" alt="A rad wolf"

    /> </picture>

  76. <picture> <source type="image/webp" src="wolf.webp" /> <img src="wolf.jpg" alt="A rad wolf"

    /> </picture>

  77. <picture> <source type="image/webp" src="wolf.webp" /> <img src="wolf.jpg" alt="A rad wolf"

    /> </picture>

  78. <picture> <source type="image/webp" src="wolf.webp" /> <img src="wolf.jpg" alt="A rad wolf"

    /> </picture>

  79. http://picture.responsiveimages.org/

  80. Picturefill by Scott Jehl https://github.com/scottjehl/picturefill

  81. <span data-picture> <span data-source data-srcset="" data-src="" data-type="" data-media=""></span> <noscript> <img

    /> </noscript> </span>

  82. <span data-picture> <span data-source data-srcset="" data-src="" data-type="" data-media=""></span> <noscript> <img

    /> </noscript> </span>

  83. <span data-picture> <span data-source data-srcset="" data-src="" data-type="" data-media=""></span> <noscript> <img

    /> </noscript> </span>

  84. <span data-picture> <span data-source data-srcset="" data-src="" data-type="" data-media=""></span> <noscript> <img

    /> </noscript> </span>

  85. Imager https://github.com/BBC-News/Imager.js RWD.Images https://github.com/stowball/rwd.images.js

  86. Responsible Images:! Responsive Images Resource Priorities Image Optimization Use Fewer

    Images Use SVG

  87. Responsible Images:! Responsive Images Resource Priorities Image Optimization Use Fewer

    Images Use SVG
  88. None
  89. None
  90. None

  91. Resource Priorities http://www.w3.org/TR/resource-priorities/

  92. Responsible Images:! Responsive Images Resource Priorities Image Optimization Use Fewer

    Images Use SVG

  93. Responsible Images:! Responsive Images Resource Priorities Image Optimization Use Fewer

    Images Use SVG

  94. ImageOptim-CLI http://jamiemason.github.io/ImageOptim-CLI/

  95. grunt-svgmin https://github.com/sindresorhus/grunt-svgmin Scour https://launchpad.net/scour

  96. Responsible Images:! Responsive Images Resource Priorities Image Optimization Use Fewer

    Images Use SVG

  97. Responsible Images:! Responsive Images Resource Priorities Image Optimization Use Fewer

    Images Use SVG

  98. Responsible Images:! Responsive Images Resource Priorities Image Optimization Fewer Images

    Use SVG

  99. Responsible Images:! Responsive Images Resource Priorities Image Optimization Fewer Images

    SVG

  100. Impact

  101. None
  102. None

  103. 1,870KB 564KB 3,505KB Images (content) Images (style) Other content

  104. Optimizations • ImageOptim-CLI on all images • WebP • Responsive

    images using Picturefill, for DPI- and viewport switching on content images

  105. 1,870KB 564KB 3,505KB Images (content) Images (style) Other content

  106. 1,870KB 72KB 261KB Images (content) Images (style) Other content

  107. 1,870KB 72KB 534KB Images (content) Images (style) Other content

  108. None

  109. “Good performance is good design” Brad Frost

  110. “Responsible images are good design” Dave Newton

  111. David Newton! @newtron on Twitter @nwtn on GitHub david@davidnewton.ca