Compresstion/decompression benchmark between JPEG and WebP with ImageMagick

bench.sh

set -e

set -x

echo "Cat"
wget --no-clobber 'https://homepages.cae.wisc.edu/~ece533/images/cat.png'

identify 'cat.png'

echo "Cat - 100%"

time convert 'cat.png' -quality 100 test.webp
time convert 'cat.png' -quality 100 test.jpeg

du --apparent-size -h test.webp test.jpeg

time convert test.webp test.bmp
time convert test.jpeg test.bmp

echo "Cat - 50%"

time convert 'cat.png' -quality 50 test.webp
time convert 'cat.png' -quality 50 test.jpeg

du --apparent-size -h test.webp test.jpeg

time convert test.webp test.bmp
time convert test.jpeg test.bmp


echo "Grand Canyon"
wget --no-clobber 'https://upload.wikimedia.org/wikipedia/commons/a/af/Grand_Canyon_view_from_Pima_Point_2010.jpg'

identify 'Grand_Canyon_view_from_Pima_Point_2010.jpg'

echo "Grand Canyon - 100%"

time convert 'Grand_Canyon_view_from_Pima_Point_2010.jpg' -quality 100 test.webp
time convert 'Grand_Canyon_view_from_Pima_Point_2010.jpg' -quality 100 test.jpeg

du --apparent-size -h test.webp test.jpeg

time convert test.webp test.bmp
time convert test.jpeg test.bmp

echo "Grand Canyon - 50%"

time convert 'Grand_Canyon_view_from_Pima_Point_2010.jpg' -quality 50 test.webp
time convert 'Grand_Canyon_view_from_Pima_Point_2010.jpg' -quality 50 test.jpeg

du --apparent-size -h test.webp test.jpeg

time convert test.webp test.bmp
time convert test.jpeg test.bmp

output.txt

[nix-shell:~/Pictures]$ bash bench.sh 
+ echo Cat
Cat
+ wget --no-clobber https://homepages.cae.wisc.edu/~ece533/images/cat.png
File ‘cat.png’ already there; not retrieving.

+ identify cat.png
cat.png PNG 490x733 490x733+0+0 8-bit sRGB 663451B 0.000u 0:00.000
+ echo 'Cat - 100%'
Cat - 100%
+ convert cat.png -quality 100 test.webp

real	0m0.626s
user	0m0.605s
sys	0m0.018s
+ convert cat.png -quality 100 test.jpeg

real	0m0.046s
user	0m0.038s
sys	0m0.007s
+ du --apparent-size -h test.webp test.jpeg
454K	test.webp
317K	test.jpeg
+ convert test.webp test.bmp

real	0m0.032s
user	0m0.023s
sys	0m0.009s
+ convert test.jpeg test.bmp

real	0m0.027s
user	0m0.020s
sys	0m0.006s
+ echo 'Cat - 50%'
Cat - 50%
+ convert cat.png -quality 50 test.webp

real	0m0.077s
user	0m0.066s
sys	0m0.010s
+ convert cat.png -quality 50 test.jpeg

real	0m0.039s
user	0m0.030s
sys	0m0.008s
+ du --apparent-size -h test.webp test.jpeg
40K	test.webp
47K	test.jpeg
+ convert test.webp test.bmp

real	0m0.027s
user	0m0.018s
sys	0m0.008s
+ convert test.jpeg test.bmp

real	0m0.023s
user	0m0.018s
sys	0m0.005s
+ echo 'Grand Canyon'
Grand Canyon
+ wget --no-clobber https://upload.wikimedia.org/wikipedia/commons/a/af/Grand_Canyon_view_from_Pima_Point_2010.jpg
File ‘Grand_Canyon_view_from_Pima_Point_2010.jpg’ already there; not retrieving.

+ identify Grand_Canyon_view_from_Pima_Point_2010.jpg
Grand_Canyon_view_from_Pima_Point_2010.jpg JPEG 2848x4288 2848x4288+0+0 8-bit sRGB 4.73281MiB 0.000u 0:00.000
+ echo 'Grand Canyon - 100%'
Grand Canyon - 100%
+ convert Grand_Canyon_view_from_Pima_Point_2010.jpg -quality 100 test.webp

real	0m13.373s
user	0m13.206s
sys	0m0.149s
+ convert Grand_Canyon_view_from_Pima_Point_2010.jpg -quality 100 test.jpeg

real	0m0.514s
user	0m0.464s
sys	0m0.045s
+ du --apparent-size -h test.webp test.jpeg
13M	test.webp
8.4M	test.jpeg
+ convert test.webp test.bmp

real	0m0.442s
user	0m0.340s
sys	0m0.095s
+ convert test.jpeg test.bmp

real	0m0.254s
user	0m0.184s
sys	0m0.068s
+ echo 'Grand Canyon - 50%'
Grand Canyon - 50%
+ convert Grand_Canyon_view_from_Pima_Point_2010.jpg -quality 50 test.webp

real	0m1.363s
user	0m1.297s
sys	0m0.052s
+ convert Grand_Canyon_view_from_Pima_Point_2010.jpg -quality 50 test.jpeg

real	0m0.326s
user	0m0.267s
sys	0m0.059s
+ du --apparent-size -h test.webp test.jpeg
600K	test.webp
1.1M	test.jpeg
+ convert test.webp test.bmp

real	0m0.233s
user	0m0.160s
sys	0m0.071s
+ convert test.jpeg test.bmp

real	0m0.170s
user	0m0.111s
sys	0m0.057s