Demo about UIImage New API in iOS 15
MacBook Air (M1, 2020) 16 GB
Xcode Version 13.0 beta (13A5155e)
Display
| cat.jpg | underpass.jpg | wave.jpg | |
|---|---|---|---|
| preparingForDisplay | 0.40 | 0.39 | 0.50 |
| DrawInRect | 0.96 | 0.92 | 1.30 |
Thumbnail
| cat.jpg | underpass.jpg | wave.jpg | |
|---|---|---|---|
| preparingThumbnail | 0.33 | 0.32 | 0.59 |
| DrawInRect(CoreGraphics) | 1.00 | 1.00 | 1.41 |
| CGImageSourceCreateThumbnailAtIndex(ImageIO) | 0.32 | 0.32 | 0.57 |
| UIGraphicsImageRenderer(UIKit) | 1.27 | 1.29 | 1.72 |
Notice that the new API preparingThumbnail have almost identfical perfromance to ImageIO technique.
Display
| cat.jpg | underpass.jpg | wave.jpg | |
|---|---|---|---|
| preparingForDisplay | 0.29 | 0.16 | 0.22 |
| DrawInRect | 0.57 | 0.46 | 0.68 |
Thumbnail
| cat.jpg | underpass.jpg | wave.jpg | |
|---|---|---|---|
| preparingThumbnail | 0.16 | 0.16 | 0.30 |
| DrawInRect(CoreGraphics) | 0.51 | 0.50 | 0.73 |
| CGImageSourceCreateThumbnailAtIndex(ImageIO) | 0.16 | 0.16 | 0.30 |
| UIGraphicsImageRenderer(UIKit) | 0.61 | 0.64 | 0.83 |