Little endian MIPS74K @480MHz without FPU, GCC 7.2.0
# JSIMD_FORCENONE=1 ./tjbench-static test-image.ppm 75 -fastdct
Using fastest DCT/IDCT algorithm
>>>>> BGR (Top-down) <--> JPEG GRAY Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.462385 fps
Output image size: 673129 bytes
Compression ratio: 22.457128:1
Throughput: 2.329887 Megapixels/sec
Output bit stream: 2.489957 Megabits/sec
Reference image written to test-image_GRAY_Q75.jpg
Decompress --> Frame rate: 0.919445 fps
Throughput: 4.632942 Megapixels/sec
Compression error written to test-image_GRAY_Q75_full-err.ppm.
>>>>> BGR (Top-down) <--> JPEG 4:2:0 Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.285719 fps
Output image size: 756896 bytes
Compression ratio: 19.971758:1
Throughput: 1.439695 Megapixels/sec
Output bit stream: 1.730077 Megabits/sec
Reference image written to test-image_420_Q75.jpg
Decompress --> Frame rate: 0.407663 fps
Throughput: 2.054152 Megapixels/sec
Compression error written to test-image_420_Q75_full-err.ppm.
>>>>> BGR (Top-down) <--> JPEG 4:2:2 Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.238334 fps
Output image size: 880889 bytes
Compression ratio: 17.160555:1
Throughput: 1.200928 Megapixels/sec
Output bit stream: 1.679565 Megabits/sec
Reference image written to test-image_422_Q75.jpg
Decompress --> Frame rate: 0.343107 fps
Throughput: 1.728864 Megapixels/sec
Compression error written to test-image_422_Q75_full-err.ppm.
>>>>> BGR (Top-down) <--> JPEG 4:4:4 Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.188371 fps
Output image size: 976234 bytes
Compression ratio: 15.484550:1
Throughput: 0.949171 Megapixels/sec
Output bit stream: 1.471151 Megabits/sec
Reference image written to test-image_444_Q75.jpg
Decompress --> Frame rate: 0.347561 fps
Throughput: 1.751307 Megapixels/sec
Compression error written to test-image_444_Q75_full-err.ppm.
# ./tjbench-static test-image.ppm 75 -fastdct
Using fastest DCT/IDCT algorithm
>>>>> BGR (Top-down) <--> JPEG GRAY Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.568756 fps
Output image size: 673129 bytes
Compression ratio: 22.457128:1
Throughput: 2.865873 Megapixels/sec
Output bit stream: 3.062767 Megabits/sec
Reference image written to test-image_GRAY_Q75.jpg
Decompress --> Frame rate: 1.171622 fps
Throughput: 5.903626 Megapixels/sec
Compression error written to test-image_GRAY_Q75_full-err.ppm.
>>>>> BGR (Top-down) <--> JPEG 4:2:0 Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.343179 fps
Output image size: 756896 bytes
Compression ratio: 19.971758:1
Throughput: 1.729228 Megapixels/sec
Output bit stream: 2.078007 Megabits/sec
Reference image written to test-image_420_Q75.jpg
Decompress --> Frame rate: 0.503371 fps
Throughput: 2.536409 Megapixels/sec
Compression error written to test-image_420_Q75_full-err.ppm.
>>>>> BGR (Top-down) <--> JPEG 4:2:2 Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.281814 fps
Output image size: 880889 bytes
Compression ratio: 17.160555:1
Throughput: 1.420020 Megapixels/sec
Output bit stream: 1.985978 Megabits/sec
Reference image written to test-image_422_Q75.jpg
Decompress --> Frame rate: 0.471297 fps
Throughput: 2.374793 Megapixels/sec
Compression error written to test-image_422_Q75_full-err.ppm.
>>>>> BGR (Top-down) <--> JPEG 4:4:4 Q75 <<<<<
Image size: 2592 x 1944
Compress --> Frame rate: 0.222632 fps
Output image size: 976234 bytes
Compression ratio: 15.484550:1
Throughput: 1.121808 Megapixels/sec
Output bit stream: 1.738727 Megabits/sec
Reference image written to test-image_444_Q75.jpg
Decompress --> Frame rate: 0.448789 fps
Throughput: 2.261380 Megapixels/sec
Compression error written to test-image_444_Q75_full-err.ppm.