Pleasantly Fast Gradle Builds

Presented at The Developers' Conference 2018

Transcript

1. Pleasantly Fast Gradle Builds
3. https://xkcd.com/303/
4. BUILD SUCCESSFUL Total time: 41.069 secs Memory BUILD SUCCESSFUL in 5s 90 actionable tasks: 6 executed, 84 up-to-date
5. BUILD SUCCESSFUL Total time: 41.069 secs Total methods: 60097 (91.70% used) Memory BUILD SUCCESSFUL in 5s 90 actionable tasks: 6 executed, 84 up-to-date Total methods: 84584 (129.07% used)
6. Gradle
7. Gradle
8. //build.gradle apply plugin: 'com.android.application' apply plugin: 'jacoco' Gradle
9. Gradle
14. Properties
15. Command line arguments $ ./gradlew assembleDebug -Dorg.gradle.jvmargs=-Xmx4096m Properties
16. Gradle Home gradle.properties org.gradle.jvmargs=-Xmx4096m dexMemory=3g Properties
17. Project gradle.properties org.gradle.jvmargs=-Xmx4096m dexMemory=3g Properties
18. Command line arguments Gradle Home Project Properties
19. Basic setup
20. Gradle Memory org.gradle.jvmargs=-Xmx4096m Memory
21. Cold Build BUILD SUCCESSFUL in 55s Incremental Build BUILD SUCCESSFUL in 8s Memory
22. //build.gradle dexOptions { javaMaxHeapSize 3g } Memory - DEX
23. org.gradle.jvmargs=-Xmx4096m //build.gradle dexOptions { javaMaxHeapSize 3g } Memory - DEX
24. //build.gradle multiDexEnabled true ... compile 'com.android.support:multidex:<version>' Multidex
25. //build.gradle productFlavors { dev { minSdkVersion 21 applicationIdSuffix '.dev' } Multidex
26. //gradle.properties org.gradle.configureondemand=true Configure on demand
27. //gradle.properties org.gradle.caching=true android.enableBuildCache=true Cache
28. Android Gradle Plugin (AGP) 3.0
29. https://blog.gradle.org/incremental-compiler-avoidance Compiler avoidance
32. // build.gradle (app) compile project(':A') compile project(':B') // build.gradle (A) compile project(':C') // build.gradle (B) compile project(':D') // ...
34. fun foo(): Bar { return Bar() }
35. fun foo(): Bar { println("Executing foo") return Bar() }
37. fun foo(): Bar { println("Executing foo") return Bar() }
38. fun foo(parameter: Boolean): Bar { // ... }
40. // build.gradle (app) implementation project(':A') implementation project(':B') // build.gradle (A) implementation project(':C') // build.gradle (B) implementation project(':D') // ...
41. fun foo(parameter: Boolean): Bar { // ... }
43. Multi module projects may build faster!
44. data class Bar(val value: Int = 0)
45. fun someFunInD() = Bar() data class Bar(val value: Int = 0)
46. data class Bar(val value: Int = 0) fun someFunInD() = Bar() Leaked Interface
47. // build.gradle (D) api project(':E')
48. // build.gradle (D) api project(':E')
49. Migrating Libraries compile -> implementation Modules compile -> implementation On demand compile -> api Declaring dependencies
50. //build.gradle productFlavors { production { dimension "minSdkVersion" } development { dimension "minSdkVersion" minSdkVersion 21 Flavor dimensions
51. //gradle.properties android.enableD8 = true android.enableD8.desugaring = true Dexing with D8
52. //gradle.properties android.enableAapt2 = true AAPT2
53. Kotlin
54. //build.gradle ext.kotlin_version = '1.2.21' //... implementation "...kotlin-stdlib...:$kotlin_version" Kotlin version
55. https://blog.jetbrains.com/kotlin/2018/02/using-gradle-build-cache-with-kotlin/ Build cache
56. //build.gradle kapt { useBuildCache = true } kapt build cache
57. //gradle.properties kotlin.incremental.usePreciseJavaTracking = true Java tracking
58. Bonus
59. Instant Run
60. https://medium.com/google-developers/instant-run-how-does-it-work-294a1633367f Instant Run
61. Updating Gradle
62. $ ./gradlew wrapper --gradle-version=4.7-rc-2 Updating Gradle
63. Wrapping Up
64. //gradle.properties dexMemory=3g org.gradle.jvmargs=-Xmx4096m -XX:MaxPermSize=4096m org.gradle.configureondemand=true org.gradle.caching=true android.enableBuildCache=true org.gradle.parallel=true android.enableAapt2=true android.enableD8=true android.enableD8.desugaring = true kotlin.incremental.usePreciseJavaTracking=true https://gist.github.com/davidtcdeveloper/2c3233904369bccf2c79be3dea64e219
65. //build.gradle dependencies { classpath 'com.android.tools.build:gradle:3.2.0-alpha10' //...
66. Tune, test, repeat...
67. How to know more? • Implementation vs API dependency: https://jeroenmols.com/blog/2017/06/14/androidstudio3 • Migrate to Android Plugin for Gradle 3.0.0: https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration.html • Faster Android Studio Builds with Dex In Process: https://medium.com/google-developers/faster-android-studio-builds-with-dex-in-process-5988ed8a a37e • Accelerate Clean Builds with Build Cache: https://developer.android.com/studio/build/build-cache.html • Optimize Your Build Speed: https://developer.android.com/studio/build/optimize-your-build.html • Incremental Compilation, the Java Library Plugin, and other performance features in Gradle 3.4: https://blog.gradle.org/incremental-compiler-avoidance • Using Gradle build cache with Kotlin: https://blog.jetbrains.com/kotlin/2018/02/using-gradle-build-cache-with-kotlin/ • Instant Run: How Does it Work?! https://medium.com/google-developers/instant-run-how-does-it-work-294a1633367f
68. slack.AndroidDevBR.org Android Dev BR
69. Thank you!