Android Studio using 100% CPU on an i7 processor for project Rebuild

Question

My Windows 7 machine has a quad core i7 processor. When I Rebuild my project, it takes on average 25 seconds. And when I launch the app, it takes on average 36 seconds (before

Answer 1

Here are the three improvements I was able to make:

I was preDexing my JARs every time I built the project, so I found this solution:

dexOptions {
    preDexLibraries = false
}

I was using the entire Google Play Services library:

compile('com.google.android.gms:play-services:+') {
    exclude module: 'support-v4'
}

When all I needed was Google Cloud Messenger:

compile('com.google.android.gms:play-services-gcm:+') {
    exclude module: 'support-v4'
}

In Eclipse, I would always do a Rebuild and then launch app with the play button. In Android Studio, now I am just doing a Clean and then launch app with the play button. Also the Run button in Android Studio does NOT work every time right after the Clean. This was causing what seemed to be delays because nothing was happening. So now I leave the Gradle Console open to make sure that the run button is working, and when it doesn't I just hit it a second time.

What I used to have:

Rebuild: 26 seconds
Launch:  36 seconds
Install: 15 seconds

and now:

Clean:    8 seconds
Launch:  22 seconds
Install: 15 seconds

which is a major improvement! Hopefully this helps someone else.