The Spot Healing Brush and Patch Tool were optimized using the Mercury Graphics Engine, making them up to 120 times faster than previous versions.
2 GB minimum, though 8 GB is highly recommended for stable performance. Adobe Photoshop CC 2015 16.0.1 Portable
The 2015 version introduced several "firsts" that are now standard in modern design: The Spot Healing Brush and Patch Tool were