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High Performance Images - Front In Amsterdam 2015

High Performance Images - Front In Amsterdam 2015

Today's average website is 62% pure image data. We use images to convey emotion, elicit an action or simply to amuse our peers. They show holiday photos, pie charts or animated cats.

To the unitiated, nothing much has changed since the JPEG file format was standardized in 1992 and GIFs became capable of showing multiple frames of cat mischief. But under the hood, the complex realm of raster and vector images is ever changing: new encoders use cues from the fields of computer vision and machine learning to optimize image data, old formats learn new tricks and completely new image formats try to take the stage.

To deliver a great user experience, we need to learn to create high performance images and implement an image management strategy: leveraging the ideal image file formats and use advanced techniques to handle the challenges of responsive designs and situational performance. High performance images increase the perceived performance of your website, improve the user experience and drive conversions.

Tobias Baldauf

August 28, 2015
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  1. High%Performance%Images
    Tobias%Baldauf%7%@tbaldauf
    #FrontInAms%2015
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 1

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  2. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 2

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  3. Hero%Images
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 3

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  4. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 4

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  5. Hero%Image%Delay%-%HID
    h"p:/
    /www.stevesouders.com/blog/2015/05/12/hero9image9custom9metrics/
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 5

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  6. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 6

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  9. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 9

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  13. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 13

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  14. Speed%&
    Usability
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 14

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  15. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 15

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  16. Saltatory(Conduc.on
    through(Nodes(of(Ranvier
    1.2m(in(100ms
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 16

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  17. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 17

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  18. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 18

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  19. "The%Psychology
    of%Speed"
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 19

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  20. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 20

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  21. Median'Time'To'Interact
    (TTI)'2013'vs.'2014
    5.3s'vs.'6.5s
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 21

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  22. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 22

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  23. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 23

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  24. Yay$for$images!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 24

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  25. Yay$for$fast$websites!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 25

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  26. Nay$for$large$image$data
    and$s1ll$having$fast$websites!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 26

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  27. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 27

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  28. Tools
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 28

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  29. "We're&really&aiming&very,&very&high&
    here…&at&something&like&100&
    milliseconds."
    —&Urs$Hölzle,$Google$Senior$VP$Opera6ons,$June$2010
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 29

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  30. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 30

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  31. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 31

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  32. WebP:
    PNG8+24+JPEG+GIF+be0er2compression
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 32

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  33. For$science!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 33

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  34. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 34

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  35. WebP:&33%&sliced&off
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 35

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  36. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 36

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  37. JPEG%XR
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 37

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  38. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 38

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  39. "Good%psy[cho,visual]%op3miza3ons%
    are%more%important%than%anything%else%
    for%compression."
    —%Fiona&Glaser,&x264&encoder&developer,&September&2010
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 39

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  40. Who$won$the$race?
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 40

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  41. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 41

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  44. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 44

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  45. JPEG
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 45

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  46. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 46

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  47. Already(fully(standardized(+(OSS(in(1992
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 47

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  48. 16.7%million%colors
    24bit
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 48

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  49. JPEG:
    based+on+human+visual+system
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 49

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  50. Human&Vision:
    Brightness&=&+2
    Color&Differen9a9on&=&:1
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 50

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  51. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 51

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  53. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 53

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  54. There%is%no%single%"best"%quality%se3ng
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 54

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  56. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 56

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  57. JPEG%encoders%are%opinionated%Rupe%Goldberg%machines
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 57

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  59. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 59

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  60. mozjpeg
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 60

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  61. Op#mized)Huffman)tables
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 61

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  62. Custom'quan+za+on'matrices
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 62

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  63. Trellis'quan,za,on
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 63

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  64. Op#mized)progressive)encoding
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 64

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  71. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 71

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  72. There's'things'JPEG'just'can't'do...
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 72

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  73. ..."not"yet,"anyway!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 73

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  74. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 74

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  75. Full$alpha$transparency
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 75

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  76. No!$Don't$use$PNG24!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 76

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  77. PNG8%can%do%full%alpha%transparency!
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 77

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  78. The$old$way:
    cat$infile.png$|$pngquant$256$>$tmp.png
    pngout'sta*c,'c3,'d8,'force,'y,tmp.png,tmp.png
    pngcrush)*bit*depth)8)*brute)*rem)alla)*reduce)tmp.png)output.png
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 78

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  79. The$much,$much$be*er$way:
    h"p:/
    /github.com/pornel/pngquant
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 79

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  82. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 82

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  83. h"p:/
    /quasimondo.com/ZorroSVG/
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 83

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  84. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 84

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  85. Some%mes'"simply"'compressing'is'not'enough
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 85

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  86. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 86

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  87. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 87

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  88. AIC
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 88

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  89. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 89

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  90. LQIP
    h"p:/
    /www.guypo.com/introducing3lqip3low3quality3image3placeholders/
    h"p:/
    /code.facebook.com/posts/991252547593574/the9technology9behind9preview9photos/
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  93. JPEG%XT
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 93

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  94. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 94

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  95. jpeg%[email protected]%stu2gart.de
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 95

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  96. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 96

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  97. Priority'I
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 97

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  98. Compress(JPEGs(with(mozjpeg(today
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 98

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  99. Follow%JPEG%XT%development%and%deploy%ASAP
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 99

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  100. Priority'II
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 100

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  101. Ship%WebP%to%Blink%browsers
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 101

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  102. Ship%JPEG*XR%to%IE/Edge
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 102

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  103. Priority'III
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 103

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  104. Transparency*via*pngquant*or*SVG*mask
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 104

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  105. Enhance'perceived'performance'+'UX
    by'using'LQIP,'AIC'&'async
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 105

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  106. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 106

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  107. Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 107

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  108. Tobias'Baldauf
    @tbaldauf
    who.tobias.is
    Tobias'Baldauf'-'@tbaldauf'-'who.tobias.is 108

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