Optimize Flutter Workflow on Bitrise

Transcript

1. 1.

   Optimize Flutter Workflow on Bitrise Hiroki Matsue (@macs_6) Mar 26th,

   2019 Flutter Meetup Tokyo #8
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   This talk is about CI steps time reduction

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   Target Listeners

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   Who know this

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   Faster CI makes devs happier

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   Reulst on my project Timeout => 9 minutes Just few

   minutes, but Free plan is not so bad ¯\(π)/¯
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   Flutter CI steps 1. Install Flutter 2. Execute "flutter analyze"

   3. Execute "flutter test" 4. Execute "flutter build" (Android and iOS both)
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   (Each results were measured with my personal project)

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   Try "Flutter Install" step optimization

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    TL;DR: Just wait new Hybrid stack https://discuss.bitrise.io/t/making-flutter-builds-faster/3976/8

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    What if we cache Flutter? • flutter installation: 137sec 㱺

    2sec (-135sec) • cache-pull: 11sec 㱺 27sec (+16sec) • cache-push: 92sec 㱺 209sec (+117sec) Only remote storage was changed, no time reduction
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    Try "flutter build" step optimization

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    TL;DR: Cache following items • ios/Pods/ • $HOME/Library/Developer/Xcode/DerivedData

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    Pods caching result • flutter build ios: 172sec 㱺 99sec

    (-73sec) • cache-pull: 9sec => 11sec (+2sec) • cache-push: 58sec 㱺 72sec (+14sec) Very effective !
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    DerivedData caching result • flutter build ios: 140sec 㱺 54sec

    (-86sec) • cache-pull: 15sec => 15sec (+0sec) • cache-push: 85sec 㱺 141sec (+56sec)
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    Non effective items on my project • build/ • ios/Flutter/

    • ios/.symlinks/ • $HOME/.gradle/ • android/.gradle/ cache-push tooks too long time for .gradle on my project.
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    References • "60% faster builds: force Xcode to use caching

    on Bitrise!" https://medium.com/@bitrise/60-faster-builds-force-xcode- to-use-caching-on-bitrise-af8979ca39a6 • "Cache Gradle dependencies on Bitrise" https:// medium.com/bitrise/cache-gradle-dependencies-on- bitrise-cf19a2580d07
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    Faster "flutter analyze" and "flutter test"? Sorry, I have no

    idea now ¯\(π)/¯
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    Other ideas • Put dependencies to the repo • Use

    build scheduling for long workflows • Pay for Bitrise • Concurrent build for ios and apk
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    Summary Caching following items, and using new Flutter Hybrid stacks

    will be efficient. • ios/Pods/ • $HOME/Library/Developer/Xcode/DerivedData
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    Thanks