Android to enhance or reduce the speed of compiled Gradle Gradle build time .md

How to upgrade Android Gradle Gradle compilation speed or reduce compilation time

The final optimization

Optimization results than

• Before optimization: just modify one line of code, click on the "Build - make project" compiler need between 15 to 28 seconds

• After optimization: just modify one line of code, click on the "Build - make project" compiled only about 8-10 seconds, if the modified code once compiled, can hit the cache, basic 3 to 4 seconds to compile complete.

• Development machine configuration

  Infrastructure
  Operating system   Windows 7 6.1
  CPU cores          8 cores
  Max Gradle workers 8 workers
  Java runtime JetBrains s.r.o OpenJDK Runtime Environment 1.8.0_152-release-1343-b01
  Java VM      JetBrains s.r.o OpenJDK 64-Bit Server VM 25.152-b01 (mixed mode)
  Max JVM memory heap size 9544 MB

All project sources, various caching temporary directory are moved to the high-performance SSD disk

1. TOSHIBA- TR200 Although the SSD, but obviously not enough high-performance (although it may may be slightly better than the average mechanical point)

gradle.properties Configuration

#因为电脑有20G内存,所以在原来的基础上直接乘与5倍，足够同时打开3个以上项目了。
org.gradle.jvmargs=-Xmx5120m -XX:MaxPermSize=1280m -Dfile.encoding=UTF-8
 
org.gradle.daemon=true
org.gradle.configureondemand=true
org.gradle.parallel=true
org.gradle.caching=true
 
#假如不启动会报错: Unable to get provider com.squareup.leakcanary.internal.LeakCanaryFileProvider: java.lang.ClassNotFoundException
android.useAndroidX=true
android.enableJetifier=true
android.enableBuildCache=true

Problems encountered

3. Android Studio is set in the automatic compilation check function was invalid problem?

Reference material

1. About IDEA can not time compilation of a temporary solution. . . . - MyHome - OSCHINA
2. Automatically compiles the early use of idea - bee's blog - CSDN blog
3. Android Studio : auto build like Eclipse - Stack Overflow
4. "Make project automatically" - only while not running/debugging – IDEs Support (IntelliJ Platform) | JetBrains

2. Timeline in Gradle Scan report - FROM-CACHE - Build cache result - Unpack takes a long time how to do?

The reason :

Compile caching (Build Cache) directory where the disk IO performance is too low, it is set to high-performance SSD solid state disk can greatly enhance unpack (Unpack) speed (lower unpack time-consuming).

For example :

The same cache size: "Cache artifact 3.62 MB / 4447 entries"

Cache directory on

1. TOSHIBA- TR200 Disk, unpack (Unpack) took 13.453s
2. Samsun SSD 850 EVO M.2Disk, unpacked (the Unpack) Processed 1.644s performance than 10-fold

reference:

• gradle.org - Build Cache

1. In accordance with references: Android projects open build scan Gradle's (build-examine) - Jane book step to do, then Sync, an error

Gradle sync failed: Could not find com.gradle:build-scan-plugin:1.8.
        Searched in the following locations:
        Required by:
        project : (2 s 761 ms)

solution

Add the following code to the project root directory:

 
buildscript {
    repositories {
        maven { url 'https://plugins.gradle.org/m2' }
    }
    dependencies {
        classpath 'com.gradle:build-scan-plugin:2.3'
    }
}
apply plugin: com.gradle.scan.plugin.BuildScanPlugin
buildScan {
termsOfServiceUrl = "https://gradle.com/terms-of-service";
termsOfServiceAgree = "yes"
}
 

详情参考: Gradle Build Scan Plugin User Manual | Gradle Enterprise Docs

Reference material

1. Build Cache

   Put org.gradle.caching=true in your gradle.properties

2. Android project open Gradle's build scan (build-examine) - Jane books

   A fine-grained performance profile is available: use the --scan option.

   buildscript {
       dependencies {
           #下面这句是添加的
           classpath 'com.gradle:build-scan-plugin:1.8' 
       }
   }
   
   #下面5行是添加的
   apply plugin: 'com.gradle.build-scan'   
   buildScan {                    
       licenseAgreementUrl = 'https://gradle.com/terms-of-service'
       licenseAgree = 'yes'
   }

3. Use a clean build a cache to speed up the construction speed | Android Developers

   Use Android 2.3.0 and later versions of the plug-in project to build the cache is enabled by default (unless you explicitly disable build a cache).

4. How does android.enableBuildCache=true functions in new Android Studio 2.2? - Stack Overflow

   • Step 0:Ensure that android.dexOptions.preDexLibraries is either not set or set to true;
   • Step 1: android.enableBuildCache=true
   • Step 2: Build your Android project and check the following locations to see whether the build cache took effect. By default the cache-dir is /.android/build-cache.

5. Some accelerated Gradle build on personal experience - for programmers Service

   -XX = -Xmx5120m org.gradle.jvmargs: MaxPermSize = 2048m -XX: + = UTF-HeapDumpOnOutOfMemoryError -Dfile.encoding. 8
   gradlew Clean --info similar to get such information, the information indicating for each task opened and used Parallel thread information

6. How to decrease your Gradle build time by 65%? - Keval Patel - Medium

   org.gradle.jvmargs=-Xmx3072m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

   gradlew android:assembleDebug --profile --configure-on-demand --daemon

7. How to speed up compilation Gradle project? - Jane books

   org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=1024m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
   org.gradle.daemon=true
   org.gradle.parallel=true
   android.enableBuildCache=true
   另外在Settings-Build,Execution,Deployment-Commond-line Options中设置"--parallel-threads={cpu线程数量}"也有一定作用

8. [Translation] week when I build Gradle is how to save a 5 hours - Jane book

   # Default value: -Xmx10248m -XX:MaxPermSize=256m
   org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8