I'm trying to speed my build in Android Studio 1.5.1 with the latest build 
tools. I'm using:

buildToolsVersion '23.0.2'
com.android.tools.build:gradle:2.0.0-alpha3
dexOptions.incremental false
dexOptions.preDexLibraries true
dexOptions.javaMaxHeapSize "4g"
dexOptions.dexInProcess true

My app is multidex, uses flavor and flavorDimensions.

Right now when I change a java line, my build time is 27s. When I run the 
profile option, the following tasks take much of the time:

:app:compileReplicaLaPresseDebugJavaWithJavac 8.998s 
:app:transformClassesWithDexForReplicaLaPresseDebug 5.993s 
:app:transformClassesWithMultidexlistForReplicaLaPresseDebug 4.385s 
:app:transformClassesWithJarMergingForReplicaLaPresseDebug 3.224s 
:app:packageReplicaLaPresseDebug 3.116s 

Is there anything wrong with my setup? I'm surprised 
compileReplicaLaPresseDebugJavaWithJavac takes 9 seconds, as I have only 
changed one line.

I know I could target Lolipop+ to avoid the multidex penalty. But 
installing on Lolipop takes such a long time that I prefer my old Nexus 10 
v4.4. :)

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