`@sveltejs/enhanced-img` causes extremely slow new/first time build for projects w/ large number of images

Describe the bug

See #15025 last comment.
I can unfortunately not give solid information on reproducing this and reluctantly submit this issue as a result. My initial reason is to warn anyone off of upgrading to vite@8 and @sveltejs/enhanced-img if you have a working build now as somewhere there is a blockage that will cause your build to grind for 5+ minutes. What is worse for me rolling back whatever I previously updated does not fix the issue. I am sure I am overlooking something obvious but the only way to get back a working build is to manually copy back node_modules from a previous release.

Reproduction

I have not found a reliable repro yet as revertign back solves it but even then upgrading svelte brings back the problem so something odd is afoot.

Logs

System Info

Node 24

Severity

blocking an upgrade

Additional Information

No response

Start by reading the last comment on issue #15025 and compare the build behavior before and after upgrading Vite, Svelte, and @sveltejs/enhanced-img. A useful result would be a reliable reproduction using a project with many images, followed by identifying the regression and confirming that a new build completes without the reported multi-minute delay.