Post-Jailbreak Cleanup runs really slow on macOS

[ClovertaTheTrilobita]

I'm using the command to run springbreak on my MacBook Air M4 with macOS 26.5.2 as instructed on Kindle Modding Wiki:

curl -L https://github.com/KindleModding/SpringBreak/releases/latest/download/springbreak.zip -o springbreak.zip && unzip springbreak.zip && cd springbreak && chmod +x ./springbreak-darwin && ./springbreak-darwin

When I rerun the command to clean up Filler Files, the progress bar said it needs nearly 2 hours for cleaning to finish

SpringBreak
===========

Searching For Devices...
Found 3 USB Device(s):
[1] /
[2] /Volumes/Kindle
[3] /Volumes/Macintosh HD

Select The Kindle Drive: 2

Kindle Detected On /Volumes/Kindle! Proceeding...
Looks Like A Kindle! Starting...

Filler Files Detected! Deleting (Post-Jailbreak Cleanup)...
Cleaning  18% |█████████                 | (906/5000, 1 it/s) [19m30s:50m11s]

Is that normal? The screenshot on the wiki page seems can finish in a minute.