Which type of compressed images you use for this plugin

Hi,
it’s just basic PHP conversion with imagejpeg
https://www.php.net/manual/en/function.imagejpeg.php

Do you have any plan to add the imagick for this plugin like add the pull down select between wordpress default or imagick?

Maybe… interesting idea… but what is your reason to do that?
I see only one advantage – Imagick is not limited by PHP limits, so yes, it can be a little bit faster, but result image will be same, or do you have some resources where you can see other difference between GD and Imagick?

I saw this link https://qdig.sourceforge.net/Main/ImageMagickVersusGD

This is the 1st time I heard about gd2 . Is imagejpeg() used gd2??

I saw IMagick better quality than GD.

Use can add code to check server support IMagick or not . You can refer to the following the check code in Warp Imagick plugin
https://www.ads-software.com/plugins/warp-imagick/

Well, as you can see, GD2 is better than Imagick.
As I know, there is no difference between GD1 and GD2 in PHP scripts, it’s just library version, so it depends on your server.
Check phpinfo() and you will see your version.

I checked and it show gd version is 2.2.5