I am resizing images at 75 quality using default GD thumb driver.
Google Page Insights tells me images can be optimized better, and it supposedly does so by comparing my images with the same images with a compression of 85.
While I am unsure about this comparison (re-compressing 75 quality images to 85 quality ?) the kb savings supposedly achieved by their method are impressive, for example 83kb -> 23kb
Other than lazyloading, srcset etc, I found an old post from google in which it suggested a command based on ImageMagick convert. The up to date version of this post suggests using ImageMin.
As Kirby’s thumbs method only offers the ‘quality’ option to tune image’s compression I was wondering what do people use, if anything for better image optimization in Kirby, if this is really possible as Page Insights suggest.
As, usually, shared hosting does not allow for the installation of further packages, it would be useful to hear of solutions that use common packages already installed in hosting servers.
Thank you !