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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