Using optimise-images.sh with new optional variable ADD_COMMENT='n'. When optional add comment variable is enabled ADD_COMMENT='y', the script's ImageMagick routine will add to optimised images a comment = optimised marking optimised images. This will allow subsequent re-runs of script to detect the comment = optimised and skip re-optimising of the previously optimised image and only optimise unoptimised images. This will speed up the optimisation process on re-runs.
Usage:
./optimise-images.sh
./optimise-images.sh {optimise} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {optimise-age} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {optimise-cron} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {optimise-cron-age} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {optimise-webp} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {optimise-webp-nginx} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {profile} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {profile-age} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {profilelog} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {testfiles} /PATH/TO/DIRECTORY/WITH/IMAGES
./optimise-images.sh {install}
./optimise-images.sh {bench}
./optimise-images.sh {bench-compare}
./optimise-images.sh {bench-webp}
./optimise-images.sh {bench-webpcompare}
./optimise-images.sh {bench} all
./optimise-images.sh {bench-compare} all
./optimise-images.sh {bench-webp} all
./optimise-images.sh {bench-webpcompare} all
optimise run at /home/optimise-benchmarks with ADD_COMMENT='y' set which adds a comment = optimised marking optimised images using convert command option -set comment optimised
./optimise-images.sh optimise /home/optimise-benchmarks
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image optimisation start
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### dslr_nikon_d7200_1.jpg (jpg) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp dslr_nikon_d7200_1.jpg -define jpeg:size=4096x4096 -filter triangle -define filter:support=2 -define jpeg:fancy- upsampling=off -unsharp 0.25x0.08+8.3+0.045 -interlace none -strip -set comment optimised -resize 2048x2048\> dslr_nikon_d7200_1.jpg
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 jpegoptim -p --max=82 dslr_nikon_d7200_1.jpg
dslr_nikon_d7200_1.jpg 2048x1365 24bit N JFIF [OK] 1238116 --> 374967 bytes (69.71%), optimized.
### webp-study-source-firebreathing.png (png) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp webp-study-source-firebreathing.png -interlace none -set comment optimised -define png:compression-filter=5 -define png:compression-level=9 -define png:compression-strategy=2 -resize 2048x2048\> webp-study-source-firebreathing.png
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 optipng -o2 webp-study-source-firebreathing.png -preserve -out webp-study-source-firebreathing.png
Output IDAT size = 1194013 bytes (5679 bytes decrease)
Output file size = 1212920 bytes (6111 bytes = 0.50% decrease)
### png24-interlaced-image1.png (png) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp png24-interlaced-image1.png -interlace plane -set comment optimised -define png:compression-filter=5 -define png:compression-level=9 -define png:compression-strategy=2 -resize 2048x2048\> png24-interlaced-image1.png
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 optipng -o2 png24-interlaced-image1.png -preserve -out png24-interlaced-image1.png
Output IDAT size = 443874 bytes (2304 bytes decrease)
Output file size = 444173 bytes (2460 bytes = 0.55% decrease)
### dslr_nikon_d7200_2.jpg (jpg) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp dslr_nikon_d7200_2.jpg -define jpeg:size=4096x4096 -filter triangle -define filter:support=2 -define jpeg:fancy- upsampling=off -unsharp 0.25x0.08+8.3+0.045 -interlace none -strip -set comment optimised -resize 2048x2048\> dslr_nikon_d7200_2.jpg
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 jpegoptim -p --max=82 dslr_nikon_d7200_2.jpg
dslr_nikon_d7200_2.jpg 1365x2048 24bit N JFIF [OK] 620849 --> 516237 bytes (16.85%), optimized.
### dslr_canon_eos_m6_1.jpg (jpg) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp dslr_canon_eos_m6_1.jpg -define jpeg:size=4096x4096 -filter triangle -define filter:support=2 -define jpeg:fancy- upsampling=off -unsharp 0.25x0.08+8.3+0.045 -interlace none -strip -set comment optimised -resize 2048x2048\> dslr_canon_eos_m6_1.jpg
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 jpegoptim -p --max=82 dslr_canon_eos_m6_1.jpg
dslr_canon_eos_m6_1.jpg 1200x800 24bit N JFIF [OK] 199273 --> 161099 bytes (19.16%), optimized.
### png24-image1.png (png) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp png24-image1.png -interlace none -set comment optimised -define png:compression-filter=5 -define png:compression- level=9 -define png:compression-strategy=2 -resize 2048x2048\> png24-image1.png
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 optipng -o2 png24-image1.png -preserve -out png24-image1.png
Output IDAT size = 386006 bytes (no change)
Output file size = 386305 bytes (132 bytes = 0.03% decrease)
### samsung_s7_mobile_1.jpg (jpg) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp samsung_s7_mobile_1.jpg -define jpeg:size=4096x4096 -filter triangle -define filter:support=2 -define jpeg:fancy- upsampling=off -unsharp 0.25x0.08+8.3+0.045 -interlace none -strip -set comment optimised -resize 2048x2048\> samsung_s7_mobile_1.jpg
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 jpegoptim -p --max=82 samsung_s7_mobile_1.jpg
samsung_s7_mobile_1.jpg 2048x1536 24bit N JFIF [OK] 437117 --> 256266 bytes (41.37%), optimized.
### bees.png (png) ###
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 /usr/bin/convert -define registry:temporary-path=/home/imagicktmp bees.png -interlace none -set comment optimised -define png:compression-filter=5 -define png:compression-level=9 - define png:compression-strategy=2 -resize 2048x2048\> bees.png
/bin/nice -n 10 /usr/bin/ionice -c2 -n7 optipng -o2 bees.png -preserve -out bees.png
Output IDAT size = 175199 bytes (no change)
Output file size = 175501 bytes (60 bytes = 0.03% decrease)
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Completion Time: 19.04 seconds
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image profile
image name : width : height : quality : transparency : image depth (bits) : size : user: group
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images in /home/optimise-benchmarks
logged at /home/optimise-logs/profile-log-180817-102339.log
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image : bees.png : 444 : 258 : 92 : False : 8 : 175501 : root : root
image : dslr_canon_eos_m6_1.jpg : 1200 : 800 : 82 : False : 8 : 161099 : root : root
image : dslr_nikon_d7200_1.jpg : 2048 : 1365 : 82 : False : 8 : 374967 : root : root
image : dslr_nikon_d7200_2.jpg : 1365 : 2048 : 82 : False : 8 : 516237 : root : root
image : png24-image1.png : 600 : 400 : 92 : False : 8 : 386305 : root : root
image : png24-interlaced-image1.png : 600 : 400 : 92 : False : 8 : 444173 : root : root
image : samsung_s7_mobile_1.jpg : 2048 : 1536 : 82 : False : 8 : 256266 : root : root
image : webp-study-source-firebreathing.png : 1024 : 752 : 92 : False : 8 : 1212920 : root : root
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Original or Existing Images:
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| Avg width | Avg height | Avg quality | Avg size | Total size (Bytes) | Total size (KB) |
| --------- | ---------- | ----------- | -------- | ------------------ | --------------- |
| 1166 | 945 | 87 | 440934 | 3527468 | 3445 |
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ImageMagick Resource Limits
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Version: ImageMagick 6.9.9-7 Q16 x86_64 2017-08-13
Resource limits:
Width: 214.7MP
Height: 214.7MP
Area: 67.057GP
Memory: 31.226GiB
Map: 62.452GiB
Disk: unlimited
File: 196608
Thread: 4
Throttle: 0
Time: unlimited
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Completion Time: 0.14 seconds
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optimise re-run at /home/optimise-benchmarks with ADD_COMMENT='y' set will result in previously optimised images being skipped when the previously embedded comment = optimised is detected
./optimise-images.sh optimise /home/optimise-benchmarks
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image optimisation start
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### dslr_nikon_d7200_1.jpg (jpg) skip already optimised ###
### webp-study-source-firebreathing.png (png) skip already optimised ###
### png24-interlaced-image1.png (png) skip already optimised ###
### dslr_nikon_d7200_2.jpg (jpg) skip already optimised ###
### dslr_canon_eos_m6_1.jpg (jpg) skip already optimised ###
### png24-image1.png (png) skip already optimised ###
### samsung_s7_mobile_1.jpg (jpg) skip already optimised ###
### bees.png (png) skip already optimised ###
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Completion Time: 2.55 seconds
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image profile
image name : width : height : quality : transparency : image depth (bits) : size : user: group
------------------------------------------------------------------------------
images in /home/optimise-benchmarks
logged at /home/optimise-logs/profile-log-180817-102713.log
------------------------------------------------------------------------------
image : bees.png : 444 : 258 : 92 : False : 8 : 175501 : root : root
image : dslr_canon_eos_m6_1.jpg : 1200 : 800 : 82 : False : 8 : 161099 : root : root
image : dslr_nikon_d7200_1.jpg : 2048 : 1365 : 82 : False : 8 : 374967 : root : root
image : dslr_nikon_d7200_2.jpg : 1365 : 2048 : 82 : False : 8 : 516237 : root : root
image : png24-image1.png : 600 : 400 : 92 : False : 8 : 386305 : root : root
image : png24-interlaced-image1.png : 600 : 400 : 92 : False : 8 : 444173 : root : root
image : samsung_s7_mobile_1.jpg : 2048 : 1536 : 82 : False : 8 : 256266 : root : root
image : webp-study-source-firebreathing.png : 1024 : 752 : 92 : False : 8 : 1212920 : root : root
------------------------------------------------------------------------------
Original or Existing Images:
------------------------------------------------------------------------------
| Avg width | Avg height | Avg quality | Avg size | Total size (Bytes) | Total size (KB) |
| --------- | ---------- | ----------- | -------- | ------------------ | --------------- |
| 1166 | 945 | 87 | 440934 | 3527468 | 3445 |
------------------------------------------------------------------------------
ImageMagick Resource Limits
------------------------------------------------------------------------------
Version: ImageMagick 6.9.9-7 Q16 x86_64 2017-08-13
Resource limits:
Width: 214.7MP
Height: 214.7MP
Area: 67.057GP
Memory: 31.226GiB
Map: 62.452GiB
Disk: unlimited
File: 196608
Thread: 4
Throttle: 0
Time: unlimited
------------------------------------------------------------------------------
Completion Time: 0.15 seconds
------------------------------------------------------------------------------