Applying a filename template to a large library re-did O(library) work for
every renamed file: a full natsort resort plus whole-table SQLite rewrite and
download-history resync after each rename, and a full scan plus resort of the
entire recipe collection per renamed LoRA. On a 20k-model library with 300k
recipes on a HDD this pushed "Apply to Library" into multi-day runs.
- ModelScanner.defer_cache_persist(): bulk loops update the in-memory entry
and indexes only; resort + persist + download-history sync run once at
context exit, forced even on cancellation/error since files are already
renamed on disk. Single-rename callers keep immediate per-call behavior.
- RecipeScanner.build_lora_hash_index(): one-shot hash -> recipes index so
per-file lookups are O(1); update_lora_filename_by_hash gains hash_index /
defer_maintenance params, with a single finalize_bulk_filename_updates()
resort at the end of a bulk session.
- ModelLifecycleService.bulk_rename_session() / BulkRenameContext wire the
deferred path through rename_model (hash index built lazily on first
recipe-touching rename).
- Blocking os.rename sequence offloaded via asyncio.to_thread so one file's
HDD I/O no longer stalls the event loop (no cross-file parallelism).
- Skip logic, per-batch WebSocket progress, cancellation, and result
counters unchanged.
Will Miao
896ce5eddb