FrG Image File Format (III): Performance Testing

FrG Image File Format (3.):Performance Testing

Author: HouSisong@GMail.com 3.03.06.10

FrG is an image file format optimized from disk loading and decoding to display the time needed. (More Introduction: http://blog.csdn.net/housisong/article/details/9077059)

Here we will show the performance comparison data of images generated under different "Compression Quality Parameters" and "compression SIZE Parameters" of FRG with other image formats;

We collected 1160 images of different high-quality actual game projects and some ISO testing images. Many images contain Alpha channels, DPI of many images is designed based on the Retina screen support; performance data is obtained based on actual tests on my computer;

Test environment:
Macosx10.8.3, CPU: i7 2.3g (single thread), memory: 8g ddr3 1600 MHz, 7zip use lzma2, load image file from disk 236 Mb/s;
1160 BMP files: argb32bit color 863,990,576 bytes and 215,980,447 pixels;
Note:. jpg no alpha color

========================================================== ========================================================== ========================================================== ==================
. Jpg 100. jpg 95. jpg 90. FRG 100 quality. FRG 90. FRG 80. FRG 75
. Bmp. PNG Quality (0 size 50 size) (0 size 50 size) (0 size 25 size 50 size) (50 size)
Image File Size 100.00% 15.13% 15.32% 6.81% 4.72% 21.04% 30.79% 11.52% 13.22% 8.52% 9.31% 9.70% 7.00%
Compressed zip 20.15% 15.09% 14.75% 6.43% 4.41% 17.96% 17.50% 10.29% 10.11% 7.70% 7.56% 7.55% 5.22%
Compressed 7z 11.11% 14.37% 13.85% 5.99% 4.07% 13.24% 11.27% 7.85% 7.41% 5.87% 5.56% 5.53% 3.83%
Memory decode
Pixels (m/s) 2,074.3 36.1 44.7 59.3 65.2 255.9 625.1 576.3 830.6 650.2 802.7 870.3 900.2
Memory decode time (MS) 99.3 5713.3 4613.2 3472.4 3160.1 804.8 329.5 357.4 248.0 316.8 256.6 236.7 228.8
Load image file from disk
236 Mb/s, load time (MS) 3,491.4 528.1 534.8 237.7 164.8 734.6 1,075.0 402.1 461.4 297.5 325.1 338.6 244.3
Certificate -------------------------------------------------------------------------------------------------------------------------------------
Load + decode time (MS) 3,590.7 6,241.4 5,148.0 3,710.1 3,324.9 1,539.4 1,404.5 759.5 709.4 614.3 581.7 575.2 473.2
57.53% 100.00% 82.48% 59.44% 53.27% 24.66% 22.50% 12.17% 11.37% 9.84% 9.32% 9.22% 7.58%
========================================================== ========================================================== ========================================================== ==================

The FRG image format allows you to specify two orthogonal parameters: Compression Quality (0.0 -- 100.0] and compression size [0.0 -- 100.0] During encoding;

. FRG (100 quality) indicates lossless compression, (0 size) indicates compression to generate as small as possible files (but may be slow in decoding), (50 size) decode speed and file size;

We can see that FRG images are capable of fast decoding.(FRG design purpose)And excellent compression capabilities. Using the FRG image format can get a much faster display speed than using PNG and other formats (about 10 times!