Comment 21 for bug 2065180

As requested, results from running stock noble on the same Pi 4B with the same SD card as before. First, stock noble (with all available upgrades):

$ sudo hyperfine --warmup 1 -r 5 "update-initramfs -u"
Benchmark 1: update-initramfs -u
  Time (mean ± σ): 193.558 s ± 2.334 s [User: 77.577 s, System: 118.253 s]
  Range (min … max): 190.964 s … 196.165 s 5 runs

Second, noble after update from the specified PPA (ppa:bdrung/ppa):

$ sudo hyperfine --warmup 1 -r 5 "update-initramfs -u"
Benchmark 1: update-initramfs -u
  Time (mean ± σ): 81.116 s ± 2.468 s [User: 16.125 s, System: 67.027 s]
  Range (min … max): 78.409 s … 84.017 s 5 runs

So a pretty substantial improvement :)