Adobe does not authorize portable versions.
Let’s break down the name:
Though later spun into Adobe XD, CC 2015 included a limited "Design Space" mode with repeat grids, better character styles, and fast SVG export. Adobe Photoshop CC 2015 16.0.1 Portable
We tested on a Lenovo ThinkPad T450 (Windows 10, i5-5300U, 8GB RAM, SSD). Adobe does not authorize portable versions
| Test Action | Installed PS 2015 | Portable PS 2015 (USB 3.0) | Portable PS 2015 (Internal SSD) | |-------------|------------------|----------------------------|---------------------------------| | Launch time (cold) | 8 sec | 22 sec | 12 sec | | Open 50MB PSD | 2 sec | 3.5 sec | 2.5 sec | | Apply Oil Paint filter (CPU) | 11 sec | 13 sec | 11.5 sec | | Brush smoothing (4K canvas) | Smooth | Slight lag | Smooth | | Save as JPEG | 1 sec | 1.2 sec | 1 sec | The Export As dialog replaced the old "Save
Conclusion: The performance penalty is minimal (10-20%) when run from a fast SSD or USB 3.1 drive. Avoid USB 2.0.
The Export As dialog replaced the old "Save for Web" for many workflows, offering preview of multiple resolutions and compression levels simultaneously.