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Secrets to Lightning- Fast Mobile Design Warm Gun 2011 Mike Krieger Instagram 1
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me - Co-founder, Instagram - Previously: UX & Front-end @ Meebo - Stanford HCI BS/MS - @mikeyk on everything 2
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12 million users in 12 months 4
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“Fast, beautiful photo sharing” 9
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“Fast, beautiful photo sharing” 10
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making your mobile experiences feel lightning-fast 11
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not the code, but the experience 12
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mobile design requires the ultimate in design & development collaboration 13
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speed matters 15
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mobile experiences fill gaps while we wait 16
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no one wants to wait while they wait 17
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JSON parsing UITableViewCell HTTP pipelining 18
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creative design decisions 19
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how speed can be a design feature 20
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how design can be a speed feature 21
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implementation details 22
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details that need to be designed 23
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3 secrets to apps that feel lightning-fast, even on 3G 24
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1. perform actions optimistically 2. adaptively pre-load content 3. move bits when no-one’s watching 25
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perform actions optimistically 26
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latency is what’ll get ya 27
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make the user feel productive 28
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request is going, but we register the like 31
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request is going, but we register the comment 34
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if it fails? 37
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why it works 40
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@thesarahnator 41
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@stayintheshade 42
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adaptive pre-loading 43
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basic version: load content before it’s needed 44
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“let’s load all the images in the feed once the user loads the page” 45
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fresh feed 30 photos to load 46
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pitfall 47
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instead... 57
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re-prioritize based on interest 58
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listen to what their flicks & taps are telling you 65
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why it works 66
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@miriamjasmine 67
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move bits when no-one’s watching 68
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sign-up 69
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? 71
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upload 74
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most apps upload here we start uploading here 82
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non-optimal engineering solution 83
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2 requests, 2 round-trips + latency need to match up 84
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but makes uploads feel really, really quick 85
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send data/info as soon as part of it’s ready to go; match up later 86
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worth it even if you throw out the data on cancel 87
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why it works 88
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where to go from here 89
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“it works” isn’t enough 90
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design & development collaboration 91
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1. perform actions optimistically 2. adaptively pre-load content 3. move bits when no-one’s watching 93
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Qs? we’re hiring:
[email protected]
get in touch: @mikeyk 94