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2019 DevDay Cutting Binary Size on a Growing App > Bruce Evans > LINE iOS Client Team Software Engineer

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> Cellular Limits > Speed > Convenience Why?

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Size Over Time 0 33 67 100 133 167 200 7.0.0 7.3.0 7.7.0 7.11.0 7.14.0 7.17.0 8.1.0 8.4.0 8.7.0 8.11.0 8.14.5 8.18.0 9.2.0 9.7.0 9.13.0 150MB Limit 2017-2019 100MB Limit 2013-2017 200MB Limit 2019~

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Tools ImageOptim Bloaty Grand Perspective

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Grand Perspective

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Work Swift Downloadable Resources Switch to First Party DIY Pruning Features Image Compression

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Image Compression Compress free images Compress `.xcasset` images Use `.xcassets`

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Downloadable Resources Download from LINE Servers Download from Third Party Apple’s On Demand Resources

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Pruning Features Outdated Features 3rd Party SDKs Extensions

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DIY Small Categories & Animations Credit Card Detection

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First Party Support Maps Localization

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Swift -Osize Reflection Metadata

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Thank You