问为什么通过Gradle和Android Studio构建的运行应用程序比通过Eclipse慢？

buildscript {

    repositories {

        maven { url 'http://repo1.maven.org/maven2' }

    }

    dependencies {

        classpath 'com.android.tools.build:gradle:0.4'

    }

}

apply plugin: 'android'

dependencies {

    compile fileTree(dir: 'libs', include: '*.jar')

    compile project(':libraries:SharedLibs')

    compile project(':libraries:actionbarsherlock')

    compile project(':libraries:FacebookSDK')

    compile project(':libraries:GooglePlayServices')

    compile project(':libraries:HorizontalGridView')

    compile project(':libraries:ImageViewTouch')

    compile project(':libraries:SlidingMenu')

}

android {

    compileSdkVersion 17

    buildToolsVersion "17.0.0"

    defaultConfig {

        minSdkVersion 8

        targetSdkVersion 16

    }

}