image size

[el_supremo]

I downloaded your image and called it test.jpg to save some typing. If you do

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identify -verbose test.jpg

it will show that there are three profiles in the image file. The EXIF is 5482 bytes, IPTC is 6678 and XMP is 6461.

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convert -strip test.jpg test2.jpg

will remove the profiles. test.jpg is 30049 bytes and test2.jpg is 11420 after the profiles are stripped.
When you save the file in Photoshop it is stripping the profiles automatically whereas ImageMagick keeps them unless you tell it to throw them away. I don't know how to strip the file in Perl but no doubt someone can help with that.
Pete