Three reported symptoms, one shape: every operation was whole-library,
whole-file, on the Qt main thread. Measured on the real library (21,482
tracks, 506 playlists, 15 MB library.json).
The track table sorted through a QSortFilterProxyModel, which asks data()
for a value on every comparison — 580k Python round trips, 8.5 s per table
load, paid again on every reload. TrackTableModel now keeps _tracks in
canonical (playlist) order plus an _order index list and sorts a key list
computed once per track. Nothing used the proxy's filtering. Sorting by #
is the identity order, so "source row" still means "playlist position" for
drag-reorder. 8.5 s -> 0.13 s; MainWindow() 18.1 s -> 0.79 s.
Smart rules compile to closures once per evaluate() instead of being
re-dispatched per track — the operator lookup, casefolding the query and
parsing the rule's own date constants all leave the 21k-iteration loop
(_match_date was re-parsing its own constant 21,482 times per rule).
Verified identical membership against the old evaluator on all 20 real
smart playlists. 2.54 s -> 0.72 s, and it now runs after the first paint.
Also: _reconcile_track skips two to_dict() round trips per unchanged track
(MERGEABLE_FIELDS in the resolver is the single source of truth for what a
merge touches); no git subprocess on the startup path (Updater.enabled is
probed lazily on the background thread, version-button tooltip deferred);
and .resolved/ is pruned to the newest 10 snapshots — it had reached 1.7 GB
across 73 snapshots inside the Syncthing share.
Time to interactive window ~15 s -> 3.2 s. The mid-session freeze when
Syncthing delivers a change — a full reload + recompute + table rebuild
with the window already on screen, which is what GNOME was offering to
force-quit — ~16 s -> 3.8 s.
The merge rework itself (playlist ordering, per-machine play journal,
quieting the dialog) is queued in TASKS.md as Round 36.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Ctrl-X now removes the track from the playlist right away (so it visibly
leaves) and a paste re-inserts it at the target — replacing the earlier
deferred-move design (dropped move_tracks_between_playlists and the MIME
cut flag). A cut from the library is still just a copy. Separately, a
left-click on any scrollbar trough now jumps to that spot instead of
paging, via an app-wide ClickToJumpScrollStyle proxy.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Cut (Ctrl-X) marks the selection on the clipboard with a `cut` flag; a
paste of a cut from a real playlist is a *move* (single-undo across
playlists via move_tracks_between_playlists; same-playlist reorders),
while a copy — or a cut from the library, which has nothing to remove —
just adds. Paste now inserts *above the selected track* rather than
appending. Cut/Paste added to the track context menu; parse_tracks_mime
now tolerates a None/empty clipboard.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
travandClaude Opus 5