Optimize Flutter Workflow on Bitrise

Flutter Meetup Tokyo #8"でのLT資料です。
https://flutter-jp.connpass.com/event/121387/

Transcript

1. Optimize Flutter Workflow on
   Bitrise
   Hiroki Matsue (@macs_6)
   Mar 26th, 2019
   Flutter Meetup Tokyo #8
   

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2. This talk is about
   CI steps time reduction
   

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3. Target Listeners
   

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4. Who know this
   

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5. Faster CI makes devs
   happier
   

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6. Reulst on my project
   Timeout => 9 minutes
   Just few minutes, but Free plan is not so bad ¯\(π)/¯
   

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7. 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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8. (Each results were measured with
   my personal project)
   

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9. Try "Flutter Install"
   step optimization
   

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

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11. 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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12. Try "flutter build"
    step optimization
    

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

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14. 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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15. 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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16. 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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17. 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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18. Faster "flutter analyze" and
    "flutter test"?
    Sorry, I have no idea now ¯\(π)/¯
    

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19. 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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20. Summary
    Caching following items, and using new Flutter Hybrid stacks
    will be efficient.
    • ios/Pods/
    • $HOME/Library/Developer/Xcode/DerivedData
    

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21. Thanks
    

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