This compression ratio tests are implemented on compressors:
- libjpeg-turbo-1.5.1
- mozjpeg-3.2
- guetzli-1.0.1
- guetzli then mozjpeg
with 2 image set:
- CMS images.
- product images.
Notes:
- libjpeg/ mozjpeg are lossless compression.
- guetzli is lossy compression with default parameters, means
butteraugliscore ~ 0.97.
./install.sh./do_mozjpeg_tests.sh./do_guetzli_tests.sh./guetzli_then_mozjpeg.sh./compare.sh
- Artifacts: 113 images (
inputs/cms). - Low/ medium quality.
| Image type | Size | Compare to inputs |
|---|---|---|
| inputs | 4093 kB | 0% |
| libjpeg | 3876 kB | -5% smaller |
| mozjpeg | 3716 kB | -9% smaller |
| guetzli | 2672 kB | -34% smaller |
| guetzli_then_mozjpeg | 2582 kB | -36% smaller |
- Artifacts: 493 images (
inputs/products). - Good quality.
| Image type | Size | Compare to inputs |
|---|---|---|
| inputs | 79925 kB | 0% |
| libjpeg | 60094 kB | -24% smaller |
| mozjpeg | 55325 kB | -30% smaller |
| guetzli | 43703 kB | -45% smaller |
| guetzli_then_mozjpeg | 40172 kB | -49% smaller |
mozjpegis 4.13% - 8% better thanlibjpeg.- The output of
guetzlilooks good, can't see the difference with human eyes. - The compression time of
guetzliis extremely slow (On a c4.2xlarge instance, guetzli compression on 493 product images takes 66 minutes).
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent