The worst block i could come up with takes around 3 minutes to validate with all 16 cores of my modern laptop’s CPU and a hour and a half of a RPi4.

bitcoin

Block propagation and validation speed during slow-to-validate blocks on Signet

0xB10C

This is detailed on [https://delvingbitcoin.org/t/great-consensus-cleanup-revival/710#p-1996-worst-case-block-validation-time-5](https://delvingbitcoin.org/t/great-consensus-cleanup-revival/710#p-1996-worst-case-block-validation-time-5)

> The worst block i could come up with takes around 3 minutes to validate with all 16 cores of my modern laptop’s CPU and a hour and a half of a RPi4.