Magento 2 Image Processing Settings: Image Adapter
What is the difference between PHP GD2 and ImageMagick? Which one is fast(optimizing website speed) and which one should be recommended?
I would lean towards ImageMagick as far as image quality goes. It seems to produce considerably sharper/higher-quality images than GD2 (at the expense of larger filesize.)
ImageMagick is also not bound by PHP's memory limit.