optimise-images.sh speed

Hi.
I was testing optimise-images.sh for optimize a bunch of jpg images.
Using this code:

Code:

find /home/testsubdir/ -type d | sort | while read d; do echo "optimise directory: $d"; echo "/root/tools/optimise-images.sh optimise $d"; /root/tools/optimise-images.sh optimise $d; done

a) 1,596 files - 100 directories, took 3min40sec for procesing it.

Code:

UNATTENDED_OPTIMISE='y', IMAGICK_RESIZE='y'

b) 1,596 files - 100 directories, took 3min38sec...

Code:

UNATTENDED_OPTIMISE='y', IMAGICK_RESIZE='n'

I want just optimize the images no resize. Any another option for make it faster?
There's no problem with cpu/disk io.

My plan is optimize more than 1,227,225 files... but with that speed...

 

This code is valid too?

Code:

find /home/testsubdir/ -type d | sort | while read d; do echo "optimise directory: $d"; echo "/root/tools/optimise-images.sh optimise-cron $d"; /root/tools/optimise-images.sh optimise-cron $d; done

3min23sec not a huge difference.

 

Thanks.
Completion Total Time: ~156,094 seconds

 

~156k seconds for 1,2M files. I will setup that cron tonight