First launch take long time (ClassLoader referenced unknown path)

Question

After updating my Android studio to 2.0 and gradle to 2.0.0 and SDK-Platform to 23.0.3 When I want to launch application it take too much time (about 2-3 second) and following warning appears in Android Monitor :

W/System: ClassLoader referenced unknown path: /data/app/net.hadifar.test-1/lib/arm
W/System: ClassLoader referenced unknown path: /data/app/net.hadifar.test-1/lib/arm
 W/art: Suspending all threads took: 5.439ms
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
W/art: Suspending all threads took: 6.808ms

But second time I launch application it's run as usual. Can any body knows what's the issue ?

Answer 1

In version 2.0 a new feature was added instant-run.

To enable this feature tool adds a lots of meta information, so the first build and upload takes more time.

Be aware about

• setting minSdkVersion 15 or higher to get any profit;

• Instant Run does not currently work with Jack (to support java 8) and will be disabled while using the new toolchain;

• you may still encounter some glitches and bugs;

Here we can write (or vote) issues (report to make the better tool).