How does multipart handle large byte arrays?

[ardevd]

From my app I'm trying to upload a chunk of data. The app generates a byte array of the data to be uploaded and passes it to the Retrofit request. I've noticed that when I do so the data seems to be copied in memory resulting in twice the memory consumption. A 30 MB data blob turns into 60 mb in memory once it's passed to the POST request with retrofit.

I then tried to migrate to a @Multipart request but that didnt seem to make any difference.

Could someone enlighten me on the best way to do this? Do multipart requests make any sense in this scenario?

[JakeWharton]

Retrofit currently buffers all request data, yes. We don't have a good workaround here, especially not for a composite request such a multipart.