Setting the minSdkVersion to 21 or above will automatically switches on
native multidex which is faster to build, especially in incremental modes,
the connected device is irrelevant.

Only InstantRun uses the connected devices to make decision about how to
deliver the application, and as Kiran noted, it's a lot more efficient to
target 21+ devices where we can slice the application in various dex files
and only redeliver one slice at a time.



On Mon, May 9, 2016 at 11:25 PM, Kiran Rao <techie.curi...@gmail.com> wrote:

> I think there is also the point about InstantRun. Certain types of cold
> swap can better be performed on devices targeting API21. Details here -
> http://developer.android.com/tools/building/building-studio.html#instant-run
>
>
> On Monday, 9 May 2016 12:30:33 UTC+2, Anatoly Korniltsev wrote:
>>
>> Hi.
>>
>> You can check it by unzipping the result apk.
>> If you configured everything correctly, there will be a lot of dex files
>> (one dex file for each library)
>> Else there will be one dex file (or a few if you are using multidex
>> anyway)
>>
>> On Friday, 6 May 2016 22:32:34 UTC+3, thierryd wrote:
>>>
>>> My point is that I don't see any speed improvement when I target SDK 21.
>>> I think AS detect my device as API 21 and bypass the multidex phase. I just
>>> want to confirm with the tool team that this is indeed the case. :)
>>>
>>>
>>>
>>> On Friday, May 6, 2016 at 1:38:09 PM UTC-4, Gonçalo Silva wrote:
>>>>
>>>> There's a better way. You can get faster compile times while keeping
>>>> AS's lint checks for your real minimum SDK.
>>>>
>>>> Define your minSdk as a function in your project's build.gradle and
>>>> then use it when compiling:
>>>> https://gist.github.com/goncalossilva/a68cc0cc46b9ae015bc1b956bfa8d9ab
>>>>
>>>> Hope this helps!
>>>>
>>>> On Fri, May 6, 2016 at 6:29 PM thierryd <thie...@gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>> In his recent article/video (
>>>>> https://medium.com/google-developers/instant-run-how-does-it-work-294a1633367f#.n0d4idmri),
>>>>> Reto says that creating a flavor that targets API 21 can make the build
>>>>> faster.
>>>>>
>>>>> I thought that the recent improvement in Android Studio already made
>>>>> this unnecessary. I thought that when AS ask the user to select the device
>>>>> to deploy on, if the device is API 21 or greater, the multidex phase is 
>>>>> not
>>>>> executed.
>>>>>
>>>>> I have a large app targeting API 17. When I run it on API 21, the
>>>>> instant run build/deploy cycle is 13s. It's the same if I use a flavor 
>>>>> that
>>>>> targets API 21.
>>>>>
>>>>>
>>>>>
>>>>>
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