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Secrets to Lightning Fast Mobile Design

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Avatar for Mike Krieger Mike Krieger
December 06, 2011
Technology
251
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Secrets to Lightning Fast Mobile Design

Presentation given at Warm Gun 2011.

Avatar for Mike Krieger

Mike Krieger

December 06, 2011
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Transcript

  1. Secrets to Lightning- Fast Mobile Design Warm Gun 2011 Mike

    Krieger Instagram 1

  2. me - Co-founder, Instagram - Previously: UX & Front-end @

    Meebo - Stanford HCI BS/MS - @mikeyk on everything 2

  3. 3

  4. 12 million users in 12 months 4

  5. 5

  6. 6

  7. 7

  8. 8

  9. “Fast, beautiful photo sharing” 9

  10. “Fast, beautiful photo sharing” 10

  11. making your mobile experiences feel lightning-fast 11

  12. not the code, but the experience 12

  13. mobile design requires the ultimate in design & development collaboration

    13

  14. 14

  15. speed matters 15

  16. mobile experiences fill gaps while we wait 16

  17. no one wants to wait while they wait 17

  18. JSON parsing UITableViewCell HTTP pipelining 18

  19. creative design decisions 19

  20. how speed can be a design feature 20

  21. how design can be a speed feature 21

  22. implementation details 22

  23. details that need to be designed 23

  24. 3 secrets to apps that feel lightning-fast, even on 3G

    24

  25. 1. perform actions optimistically 2. adaptively pre-load content 3. move

    bits when no-one’s watching 25

  26. perform actions optimistically 26

  27. latency is what’ll get ya 27

  28. make the user feel productive 28

  29. 29

  30. 30

  31. request is going, but we register the like 31

  32. 32

  33. 33

  34. request is going, but we register the comment 34

  35. 35

  36. 36

  37. if it fails? 37

  38. 38

  39. 39

  40. why it works 40

  41. @thesarahnator 41

  42. @stayintheshade 42

  43. adaptive pre-loading 43

  44. basic version: load content before it’s needed 44

  45. “let’s load all the images in the feed once the

    user loads the page” 45

  46. fresh feed 30 photos to load 46

  47. pitfall 47

  48. 48

  49. 49

  50. 50

  51. 51

  52. 52

  53. 53

  54. 54

  55. 55

  56. 56

  57. instead... 57

  58. re-prioritize based on interest 58

  59. 59

  60. 60

  61. 61

  62. 62

  63. 63

  64. 64

  65. listen to what their flicks & taps are telling you

    65

  66. why it works 66

  67. @miriamjasmine 67

  68. move bits when no-one’s watching 68

  69. sign-up 69

  70. 70

  71. ? 71

  72. 72

  73. 73

  74. upload 74

  75. 75

  76. 76

  77. 77

  78. 78

  79. 79

  80. 80

  81. 81

  82. most apps upload here we start uploading here 82

  83. non-optimal engineering solution 83

  84. 2 requests, 2 round-trips + latency need to match up

    84

  85. but makes uploads feel really, really quick 85

  86. send data/info as soon as part of it’s ready to

    go; match up later 86

  87. worth it even if you throw out the data on

    cancel 87

  88. why it works 88

  89. where to go from here 89

  90. “it works” isn’t enough 90

  91. design & development collaboration 91

  92. 92

  93. 1. perform actions optimistically 2. adaptively pre-load content 3. move

    bits when no-one’s watching 93

  94. Qs? we’re hiring: [email protected] get in touch: @mikeyk 94