Assets.car increased in size significantly in Xcode 15

The Assets.car file in Archive and thus in exported .ipa file has significantly increased when archived in Xcode 15 compared to Xcode 14.3.1.

For example, the Assets.car file size in the archive made in Xcode 14.3.1 is 125 MB, but in the archive made in Xcode 15 from completely the same project size is 200 MB.

Assets have many images as PNG and PDF.

What has changed in Xcode 15 for building Assets.car file and how the size can be reduced? Use SVG instead of PDF (and PNG?)?

Thanks