使用android gradle插件3.0.0比gradle插件2.3.3慢

Question

当将com.android.tools.build:gradle:2.2.3更新为com.android.tools.build:gradle:3.0.0时，我发现构建时间超过2.3.3。

根build.gradle是

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
    }
}

app/build.gradle在这里，我所有的依赖都使用compile

apply plugin: 'com.android.application'
android {
    sourceSets {
        main {
            ...
        }
    }

    dexOptions {
        preDexLibraries = false
        incremental true
        javaMaxHeapSize "8g"
        keepRuntimeAnnotatedClasses false

    }

    lintOptions {
        abortOnError false
        checkReleaseBuilds false
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/license.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/notice.txt'
        exclude 'META-INF/ASL2.0'
        exclude 'org/apache/commons/codec/language/bm/*.txt'
    }
    compileSdkVersion 24
    buildToolsVersion "27.0.1"
 }
 defaultConfig {
        applicationId "com.gg.kk"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 512654
        versionName "version"
        multiDexEnabled true

}
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:multidex:1.0.1'
    .... many dependencies ....
}

谁能告诉我为什么我的构建变得缓慢？