bug#19832: Deleting unused links is too slow

[Andreas Enge]

Hello,

I just compiled a test package and tried a
"guix gc -d /path/to/package/in/store"

After printing
 deleting `/gnu/store/642pwarg5hppzh1gwadd07w0g4w3rwpx-nss-certs-3.17.3'
 deleting `/gnu/store/trash'
 deleting unused links...
which is instantaneous, I need to wait for 5 minutes with the disk spinning.

I suppose this is a side-effect of deduplication?

Andreas