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Android: What is purpose of DISABLE_DEXPREOPT flag while building AOSP?

+2 votes
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I am often confused with Dex Optimization details. Here are few details I know of.

Kindly correct me if i am wrong ? While exploring the source code, i found that package manager scans all the external libraries, base frameworks, system packages, and vendor packages for dex optimization.

So, if I understand correct 'dex optimization' can be done both in compilation time and execution time.

Also, surfing in the internet, DISABLE_DEXPREOPT has an impact over this dex optimization when to be done?

Which one do I have to opt? 

DISABLE_DEXPREOPT=true [OR] DISABLE_DEXOPT=false

while building with the below command 

make TARGET= droid -j6

According to the source code, I understood if .odex is available as part of .jar or apk file, then it ignores dex optimization, while booting.

Kindly correct me if i am wong?. and suggest.

posted Jun 23, 2014 by Mandeep Sehgal

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