5 years on air - Sergiy Grechukha

Android gradle plugin tricks around application build time

Transcript

1. Android gradle plugin tricks around application build time modules vs singleModule
2. What’s your problem, Dude!? Spaghetti code Library zoo Tones of res Possible errors Huge build time
3. What is the prefered way? Teams must cause a minimal effect at each other’s workflow
4. What is the prefered way? Separate builds for each stream Stream1 Stream2 Stream3 Stream 200600 Stream 100500
5. What is the prefered way? Architecture must support easy testing (unit and UI)
6. What is the prefered way? Fastest build on this bank of the Dnieper
7. Income Main screen + second screen for each stream FeatureA FeatureB FeatureC FeatureD MAIN SCREEN
8. Income FeatureA FeatureB FeatureC FeatureD Something Usefull Common functionality in SomethingUsefull
9. Income FeatureA FeatureB FeatureC FeatureD 2k classes for each of 4 streams apt magic
10. What’s wrong with apt?
11. Measuring tools • KeepSafe/dexcount-gradle-plugin • Gradle-scan plugin • https://github.com/gradle/gradle-profiler
12. KeepSafe/dexcount-plugin > Task :app:countFullDebugDexMethods Total methods in app-full-debug.apk: 52157 (79.59% used) Total fields in app-full-debug.apk: 23616 (36.04% used) Total classes in app-full-debug.apk: 12664 (19.32% used) Methods remaining in app-full-debug.apk: 13378 Fields remaining in app-full-debug.apk: 41919 Classes remaining in app-full-debug.apk: 52871
13. Gradle-scan plugin
14. Gradle-scan plugin
15. Gradle profiler Run using: ToolingApi Cleanup Tasks: [] Tasks: [clean, assembleFullDebug] Gradle args: [] Build changes: none Warm-ups: 6 Builds: 10 * Running scenario using Gradle 3.5 (scenario 1/1) * Stopping daemons * Running warm-up build 1 with tasks [clean, assembleFullDebug] Execution time 60924ms * Running warm-up build 2 with tasks [clean, assembleFullDebug] Execution time 30091ms
16. Gradle profiler build,3.5 tasks,clean assembleFullDebug build 1,19746 build 2,25880 build 3,22192 build 4,22437 build 5,27784 build 6,28752 mean, 24465.16667 median, 24158.5
17. Step 1 Update gradle plugin! (gradle-4.1-milestone-1 which was used with android gradle plugin (AGP) 3.0.0-alpha6) build,4.1-milestone-1 tasks,clean assembleFullDebug build 1,25061 build 2,24898 build 3,23100 build 4,23677 build 5,24808 build 6,21733 mean, 23879.5 median, 24242.5 gradle.properties: org.gradle.configureondemand=true org.gradle.jvmargs=-Xmx1536m
18. Step 2 (hard one) - modules
19. Step 2 (hard one) - modules • show top level build.gradle • show build.gradle (Module app) • show build.gradle (app-shell) Notes: • Common ext.vars • implementation/api dsl • downstreaming flavor policy
20. Step 2 (hard one) - modules build,4.1-milestone-1 tasks,clean assembleFullDebug build 1,23142 build 2,19861 build 3,20159 build 4,19912 build 5,18319 build 6,19007 mean, 20066.66667 median, 19886.5 4 seconds == 17% are squeezed out
21. Simple math: if build time == 5 min 1 dev builds app 4 times per hour There are 5 devs in one stream There are 4 streams 8 hour per day I’ve squeezed 1 min 1 min 4 min 20 min 80 min 640 min
22. Build process timeLines (modules vs singleModule)
23. Build process timeLines (modules vs singleModule)
24. Step 3 - caching org.gradle.caching=true build,4.1-milestone-1 tasks,clean assembleFullDebug build 1,10153 build 2,10176 build 3,9951 build 4,9735 build 5,9774 build 6,9022 build 7,9106 build 8,9401 build 9,9309 build 10,9330 mean,9533.7777777777 median,9401.0
25. Results (table)
26. Results (chart)
27. Few more words about build time for dev build: Do not use dynamic values (for app version for instance)
28. Few more words about build time for dev build: Use one set of resources
29. Few more words about build time for dev build: Disable crashlytics
30. Few more words about build time for dev build: Disable aapt crunching
31. Conclusions • All of this stuff can easily be ignored on powerful PCs. • Modularizing the app is not so easy • Be careful with unreleased new features (aapt2) • Once you designed your multimodule architecture do not forget about tests • Switching to modules is a question of time and sooner or later you’ll switch
32. Links • Git module app • Git singleModule app • More on this topic Useful links: • Gradle summit 2017 • Migrate to android gradle plugin 3.0
33. Contacts Sergiy Grechukha FaceBook LinkedIn Skype: grechukha_sergey