Why is Google maps only 48 Megabytes on Android 4.4.4, but is 125M on Android 5.1.1? The Android 5.1.1 phone seems to have a 32-bit processor and the 4.4.4 phone seems to have a 64-bit processor from devicespecifications.com. I would think the 64-bit phone would have the larger binary.

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    Main reason will be that Android 4.4 uses Dalvik, but with Android 5 and up ART is used, which on average needs about 25..50% more space for "pre-compiled code". Though the difference between 48M and 125M seems to exceed that – which might mean different versions (either in terms of "version numbers" or in terms of "variants" due to the different Android versions) are a second criterion. – Izzy May 6 '17 at 20:18
  • The version numbers listed in the app settings appear to be the same. Is there any other way to check? – Lee May 6 '17 at 23:14
  • I've also discovered that I can enabled ART on my phone. I tried, but nothing seemed to change. What I read was that it only works for the snapdragon chipset, but I think my phone has mediatek. Thank you for the information. – Lee May 6 '17 at 23:35
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    @Izzy Two primary reasons: 1. On a 64-bit system some apps are optimized twice, generating a 32-bit odex and a 64-bit odex. 2. All libs are extracted on Android L. – iBug May 7 '17 at 1:22

If you have root access, you can browse /data/app and that's the difference.

# Sample for Android K 4.4

# Sample for Android L 5.0/5.1

And if you list the content of one of them, you'll see

base.apk (54MB)


libcronet.59.0.3602.4.so    (4.9MB)
libgmm-jni.so    (9.4MB)

Also, Android 4.4 implements the old Dalvik VM, while on Android 5+, Google switched to a new VM called ART. The main difference is that Dalvik compiles apps Just-In-Time (JIT), while ART compiles Ahead-Of-Time (AOT), so more code is compiled in ART than in Dalvik. That's why this one is really big:

/data/dalvik-cache/arm64/data@app@com.google.android.apps.maps-1@base.apk@classes.dex    (109.5MB)

On Android 4.4 it's much smaller, you can find it out by yourself.

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