During installation, you’ll be asked about compression method: Normal (fast) vs. Ultra (slow but smaller final size). Choose "Ultra" if you are on an HDD; choose "Normal" if on an NVMe SSD.
Wallpaper Engine v1.0.981 – Repack Information (Archival Reference) Wallpaper Engine v1.0.981 RePack
This specific version is an older build of the software. Current official versions are much further ahead in the versioning cycle, featuring significantly improved performance and Android compatibility. RePack Features: Wallpaper Engine v1.0.981 RePack