Hello, looks nice! I had a few thoughts:

- I'd consider adding support for libvips smartcrop, ICC colour management, HDR, image alpha

- can you join pipelines? you could have one making a background, one making a foreground, then composite them, for example

- your benchmarks don't measure peak memory use, it can be a useful thing to test, especially if people are processing large images (eg. the output of every modern smartphone sigh)

- have you benchmarked against nip4, the official libvips GUI? it has a CLI mode you can run with GNU parallel

- I agree, a CLI mode for your tool sounds useful

Hi, thanks for the comments.

- I'd consider adding support for libvips smartcrop, ICC colour management, HDR, image alpha Fair enough - I wanted to first see if there's interest in the tool and then I'd definitely add more functions.

- can you join pipelines? you could have one making a background, one making a foreground, then composite them, for example No, you can't join them currently in this way. Sounds like an interesting advanced feature to add.

- your benchmarks don't measure peak memory use, it can be a useful thing to test, especially if people are processing large images (eg. the output of every modern smartphone sigh) Very good point, I should definitely have measured that too. Will add that soon.

- have you benchmarked against nip4, the official libvips GUI? it has a CLI mode you can run with GNU parallel I haven't and that would indeed by interesting to measure. Will look into it as well.

- I agree, a CLI mode for your tool sounds useful I'll probably add a CLI if the tool gets traction and it's requested.