Notice how everybody replying says "less than 5s".

As if anything done on a machine going through 10_000_000_000 (10 Giga) instructions per seconds should be anything but perceived instantaneous, for it's finite lifetime human user.

On my personal 2017-vintage i5-7200U, GIMP opens in under 5 seconds. On the computer I had for my last job, a 2023-ish i7, about 30 seconds. The problem was the shitheap of corporate security software that bogged down the zillion file access operations during application startup, not the app itself.

GIMP takes ~2s to start on my 2016 Linux laptop.

(Though I do think it takes significantly longer to start on my 2024 MBP…)

GIMP takes pretty long to launch indeed, but it's still under 5 seconds on my 6yo XPS 13. Even on my Cortex-A53 phone it doesn't reach 10 seconds.