Same performance. No downsides except missing Start Menu shortcut.

I’ve been testing the portable version of Lossless Scaling (LS) – the one that doesn’t require installation – and it’s surprisingly solid.

What are you using? (Steam Deck, Ally, etc.) Which game are you trying to optimize? Do you need help with SteamOS/Linux compatibility?

Here is everything you need to know about setting up and using Lossless Scaling in a portable fashion. What is Lossless Scaling?

If you own multiple gaming laptops or handhelds, carrying your "Portable Lossless Scaling" folder on a tiny thumb drive means your custom profiles for specific games travel with you. Important Considerations