The scan lists the whole folder tree before it checks a photo. On a large
folder on a network share that takes minutes, and the scan's row showed
"0 of 64085" with an empty bar all that while: it looked frozen. ✕ did
not stop the listing either.
- engine: SyncProgress counts the folders and files the walk listed and
says when the listing is over; a folder note (walk::NoteFolder) now
answers whether to go on, and a cancelled scan answers no.
- ui: while the folder is listed, the row has an indeterminate bar and
reads "Listing folders: N folders, M files · folder" (all 13
catalogs); the dialog says the same; then the photos checked are
counted as before.
Co-Authored-By: Claude <noreply@anthropic.com>
The scan asked the disk about every library photo in the folder: is its
file there, and has it a sidecar under any of four names. On a network
share each question is a round trip, and the scan had just listed the
folder. Measured on a hard disk over SMB, for unchanged folders of 1,600
to 2,400 photos: 4.6 to 7.1 s of questions after a listing of 4 to 5 s.
- The walk hands each folder's listing over (`walk::files_in_noting`:
every entry's name and kind, hidden ones too, and whether that is all of
them). The scan walks the folder once, then checks the photos beside
the probing of new files.
- `sync::Listing` answers "is it there" / "is it a file" where that holds
on any file system: a name the folder lists is there; a plain ASCII name
is not there when the folder was listed to its end, all its names are
ASCII and none is that name in another case. Everything else is asked
of the disk as before (a link, a name Windows reads another way, a
folder that was not walked, and every name not listed in a folder that
holds a name outside ASCII).
Now under 0.05 s for those folders. Two things differ on purpose: a file
the folder lists is there though it can't be opened by its path (a folder
that may be listed but not searched, an over-long path), where such
photos were listed as missing; and the answers are the folder as the
walk saw it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
