Android studio 2.0 is stable and reduces the application startup speed

I'm using Android studio 1.5 (not very fast). Today I updated it to a stable version of 2.0. Now it takes 2-3 minutes to start. After the first start, I immediately checked the application information screen and found that there was 41mb (depending on different devices) in the first cache. I don't know what happened. This is my gradle file

apply plugin: 'com.android.application'
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    packagingOptions {


        exclude 'Meta-INF/NOTICE'

        exclude 'Meta-INF/LICENSE'

        exclude 'Meta-INF/DEPENDENCIES'

        exclude 'Meta-INF/DEPENDENCIES.txt'

        exclude 'Meta-INF/LICENSE.txt'

        exclude 'Meta-INF/NOTICE.txt'
    }
    sourceSets {
        main.jniLibs.srcDirs = ['libs']
    }



    defaultConfig {
        applicationId "com.my.app"
        minSdkVersion 17
        targetSdkVersion 21
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false;
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

    }
    dexOptions {
        preDexLibraries = false
        javaMaxHeapSize "2g"
    }


}


dependencies {

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

    compile project(':volley')
    compile project(':android-country-picker-master')
    compile project(':viewPagerIndicator')


    compile ('com.android.support:design:23.1.1') {
        exclude module: 'support-v4'
    }
    compile ('com.google.code.gson:gson:2.5'){
        exclude module: 'support-v4'
    }
    compile ('com.squareup.picasso:picasso:2.5.0'){
        exclude module: 'support-v4'
    }
    compile ('pl.droidsonroids.gif:android-gif-drawable:1.1.10'){
        exclude module: 'support-v4'
    }
    compile ('javax.annotation:javax.annotation-api:1.2'){
        exclude module: 'support-v4'
    }
    compile ('com.google.android.gms:play-services:8.4.0') {
        exclude module: 'support-v4'
    }
    compile ('com.squareup.retrofit:retrofit:1.9.0'){
        exclude module: 'support-v4'
    }
    compile ('com.squareup.okhttp:okhttp:2.4.0'){
        exclude module: 'support-v4'
    }
    compile 'org.apache.httpcomponents:httpclient:4.5.1'
    compile 'org.apache.httpcomponents:httpmime:4.3.6'
    compile ('com.google.guava:guava:18.0') {
        exclude module: 'support-v4'
    }
    compile ('org.apache.commons:commons-lang3:3.4'){
        exclude module: 'support-v4'
    }

}

Any help will be appreciated. Thank you

resolvent:

As stated herein: http://tools.android.com/tech-docs/instant-run

Try to implement it in gradle

android {
productFlavors {
    // Define separate dev and prod product flavors.
    dev {
        // dev utilizes minSDKVersion = 21 to allow the Android gradle plugin
        // to pre-dex each module and produce an APK that can be tested on
        // Android Lollipop without time consuming dex merging processes.
        minSdkVersion 21
    }
    prod {
        // The actual minSdkVersion for the application.
        minSdkVersion 14
    }
}
      ...
buildTypes {
    release {
        runProguard true
        proguardFiles getDefaultProguardFile('proguard-android.txt'),
                                             'proguard-rules.pro'
    }
}

}
dependencies {
  compile 'com.android.support:multidex:1.0.0'
}