WebPShop VS libvips

Grab a the webp plugin for Photoshop: https://developers.google.com/speed/webp/docs/webpshop

Knock yourself out mate

Webp is a newer format and adoption hasn't reached universal levels yet, but there's a free (official) Photoshop plugin: https://developers.google.com/speed/webp/docs/webpshop. It compresses well and can store lossless data.

This fixes it

Try the free Squoosh.app from Google, you can see before and after at the same time. Ideally you'd use webp as the format, it's supported by most browser and WP since 5.8. They also have a webp plugin for Photoshop which uses the same algorithm, meaning that you can try with the before and after on their site and test different percentages, and then replicate or automate it in Photoshop.

most common would be to use Photoshop with Google's WebPShop plugin

After some research, I found libvips, a demand-driven, horizontally threaded image processing library. It is designed to run quickly while using as little as memory as possible.

Sharp is a fast and efficient image optimization Node.js module that makes use of the native libvips library.

h2non/bimg can handle both if the underlying libvips is compiled with support for both formats.

if you're using linux (which it doesn't seem so) there's also vispdisp https://github.com/jcupitt/vipsdisp which is based on https://github.com/libvips/libvips which will likely take over how images are decoded in the future for everything, at least methodology wise.

The magic happens by way of a library called Libvips, which contains an ultra-high-speed low-memory image resizer.

imagor uses one of the most efficient image processing library libvips. It is typically 4-8x faster than using the quickest ImageMagick and GraphicsMagick settings.

Try the solutions here: https://github.com/libvips/libvips/issues/2479

in that case maybe take a look at https://github.com/libvips/libvips

libvips v8.6+ or ImageMagick for image analysis and transformations