Ionic Deploy does not use compression when download sources

#1

We use cordova-plugin-ionic v5.2.7 for our application with UPDATE_METHOD = auto which do app sources update with the splash screen loading.

But we noticed that update works very slow and splash screen may stuck for a minute or more for initial app loading. After debug we found that Ionic do each file downloading instead of downloading www.zip one compressed file and then extract/unzip it.

Current output example:
File Transfer Finished with response code 200

File Transfer Finished with response code 200
downloaded batch 1 of 20 downloads. Done downloading 10 of 426 files
File Transfer Finished with response code 200

File Transfer Finished with response code 200
downloaded batch 2 of 20 downloads. Done downloading 20 of 426 files

etc it download each file, 426 requests in total and of course it works slow.

So my question is - how we can enable compression for our application to download sources zipped? Is there some setting to turn compression on? I did not find anything in documentation…