Avoid creating CardGenContexts for every note

This requires CardGenContext to be generic, so it works both with an
owned and borrowed notetype.

rslib/src/dbcheck.rs

@@ -262,7 +262,11 @@ impl Collection {
 
                 // write note, updating tags and generating missing cards
                 let ctx = genctx.get_or_insert_with(|| {
-                    CardGenContext::new(&nt, self.get_last_deck_added_to_for_notetype(nt.id), usn)
+                    CardGenContext::new(
+                        nt.as_ref(),
+                        self.get_last_deck_added_to_for_notetype(nt.id),
+                        usn,
+                    )
                 });
                 self.update_note_inner_generating_cards(
                     ctx, &mut note, &original, false, norm, true,

rslib/src/import_export/text/import.rs

@@ -32,6 +32,7 @@ struct Context<'a> {
     deck_ids: HashMap<String, Option<DeckId>>,
     usn: Usn,
     normalize_notes: bool,
+    card_gen_ctxs: HashMap<(NotetypeId, DeckId), CardGenContext<Arc<Notetype>>>,
     //progress: IncrementableProgress<ImportProgress>,
 }
 
@@ -52,6 +53,7 @@ impl<'a> Context<'a> {
             normalize_notes,
             notetypes,
             deck_ids,
+            card_gen_ctxs: HashMap::new(),
         })
     }
 
@@ -89,7 +91,7 @@ impl<'a> Context<'a> {
         for foreign in notes {
             if let Some(notetype) = self.notetype_for_note(&foreign)? {
                 if let Some(deck_id) = self.deck_id_for_note(&foreign)? {
-                    let log_note = self.import_foreign_note(foreign, &notetype, deck_id)?;
+                    let log_note = self.import_foreign_note(foreign, notetype, deck_id)?;
                     log.new.push(log_note);
                 }
             }
@@ -100,12 +102,12 @@ impl<'a> Context<'a> {
     fn import_foreign_note(
         &mut self,
         foreign: ForeignNote,
-        notetype: &Notetype,
+        notetype: Arc<Notetype>,
         deck_id: DeckId,
     ) -> Result<LogNote> {
         let today = self.col.timing_today()?.days_elapsed;
-        let (mut note, mut cards) = foreign.into_native(notetype, deck_id, today);
-        self.import_note(&mut note, notetype)?;
+        let (mut note, mut cards) = foreign.into_native(&notetype, deck_id, today);
+        self.import_note(&mut note, &notetype)?;
         self.import_cards(&mut cards, note.id)?;
         self.generate_missing_cards(notetype, deck_id, &note)?;
         Ok(note.into_log_note())
@@ -128,13 +130,16 @@ impl<'a> Context<'a> {
 
     fn generate_missing_cards(
         &mut self,
-        notetype: &Notetype,
+        notetype: Arc<Notetype>,
         deck_id: DeckId,
         note: &Note,
     ) -> Result<()> {
-        let card_gen_context = CardGenContext::new(notetype, Some(deck_id), self.usn);
+        let card_gen_context = self
+            .card_gen_ctxs
+            .entry((notetype.id, deck_id))
+            .or_insert_with(|| CardGenContext::new(notetype, Some(deck_id), self.usn));
         self.col
-            .generate_cards_for_existing_note(&card_gen_context, note)
+            .generate_cards_for_existing_note(card_gen_context, note)
     }
 }
 

rslib/src/notes/mod.rs

@@ -80,7 +80,7 @@ impl Collection {
                 .get_notetype(note.notetype_id)?
                 .ok_or_else(|| AnkiError::invalid_input("missing note type"))?;
             let last_deck = col.get_last_deck_added_to_for_notetype(note.notetype_id);
-            let ctx = CardGenContext::new(&nt, last_deck, col.usn()?);
+            let ctx = CardGenContext::new(nt.as_ref(), last_deck, col.usn()?);
             let norm = col.get_config_bool(BoolKey::NormalizeNoteText);
             col.add_note_inner(&ctx, note, did, norm)
         })
@@ -334,7 +334,7 @@ impl Collection {
 
     pub(crate) fn add_note_inner(
         &mut self,
-        ctx: &CardGenContext,
+        ctx: &CardGenContext<&Notetype>,
         note: &mut Note,
         did: DeckId,
         normalize_text: bool,
@@ -397,7 +397,7 @@ impl Collection {
             .get_notetype(note.notetype_id)?
             .ok_or_else(|| AnkiError::invalid_input("missing note type"))?;
         let last_deck = self.get_last_deck_added_to_for_notetype(note.notetype_id);
-        let ctx = CardGenContext::new(&nt, last_deck, self.usn()?);
+        let ctx = CardGenContext::new(nt.as_ref(), last_deck, self.usn()?);
         let norm = self.get_config_bool(BoolKey::NormalizeNoteText);
         self.update_note_inner_generating_cards(&ctx, note, &existing_note, true, norm, true)?;
         Ok(())
@@ -405,7 +405,7 @@ impl Collection {
 
     pub(crate) fn update_note_inner_generating_cards(
         &mut self,
-        ctx: &CardGenContext,
+        ctx: &CardGenContext<&Notetype>,
         note: &mut Note,
         original: &Note,
         mark_note_modified: bool,
@@ -508,7 +508,7 @@ impl Collection {
                 if out.generate_cards {
                     let ctx = genctx.get_or_insert_with(|| {
                         CardGenContext::new(
-                            &nt,
+                            nt.as_ref(),
                             self.get_last_deck_added_to_for_notetype(nt.id),
                             usn,
                         )

rslib/src/notetype/cardgen.rs

@@ -1,7 +1,10 @@
 // Copyright: Ankitects Pty Ltd and contributors
 // License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
-use std::collections::{HashMap, HashSet};
+use std::{
+    collections::{HashMap, HashSet},
+    ops::Deref,
+};
 
 use itertools::Itertools;
 use rand::{rngs::StdRng, Rng, SeedableRng};
@@ -38,9 +41,9 @@ pub(crate) struct SingleCardGenContext {
 
 /// Info required to determine which cards should be generated when note added/updated,
 /// and where they should be placed.
-pub(crate) struct CardGenContext<'a> {
+pub(crate) struct CardGenContext<N: Deref<Target = Notetype>> {
     pub usn: Usn,
-    pub notetype: &'a Notetype,
+    pub notetype: N,
     /// The last deck that was added to with this note type
     pub last_deck: Option<DeckId>,
     cards: Vec<SingleCardGenContext>,
@@ -53,20 +56,21 @@ pub(crate) struct CardGenCache {
     deck_configs: HashMap<DeckId, DeckConfig>,
 }
 
-impl CardGenContext<'_> {
-    pub(crate) fn new(nt: &Notetype, last_deck: Option<DeckId>, usn: Usn) -> CardGenContext<'_> {
+impl<N: Deref<Target = Notetype>> CardGenContext<N> {
+    pub(crate) fn new(nt: N, last_deck: Option<DeckId>, usn: Usn) -> CardGenContext<N> {
+        let cards = nt
+            .templates
+            .iter()
+            .map(|tmpl| SingleCardGenContext {
+                template: tmpl.parsed_question(),
+                target_deck_id: tmpl.target_deck_id(),
+            })
+            .collect();
         CardGenContext {
             usn,
             last_deck,
             notetype: nt,
-            cards: nt
-                .templates
-                .iter()
-                .map(|tmpl| SingleCardGenContext {
-                    template: tmpl.parsed_question(),
-                    target_deck_id: tmpl.target_deck_id(),
-                })
-                .collect(),
+            cards,
         }
     }
 
@@ -209,7 +213,7 @@ pub(crate) fn extract_data_from_existing_cards(
 impl Collection {
     pub(crate) fn generate_cards_for_new_note(
         &mut self,
-        ctx: &CardGenContext,
+        ctx: &CardGenContext<impl Deref<Target = Notetype>>,
         note: &Note,
         target_deck_id: DeckId,
     ) -> Result<()> {
@@ -224,7 +228,7 @@ impl Collection {
 
     pub(crate) fn generate_cards_for_existing_note(
         &mut self,
-        ctx: &CardGenContext,
+        ctx: &CardGenContext<impl Deref<Target = Notetype>>,
         note: &Note,
     ) -> Result<()> {
         let existing = self.storage.existing_cards_for_note(note.id)?;
@@ -233,7 +237,7 @@ impl Collection {
 
     fn generate_cards_for_note(
         &mut self,
-        ctx: &CardGenContext,
+        ctx: &CardGenContext<impl Deref<Target = Notetype>>,
         note: &Note,
         existing: &[AlreadyGeneratedCardInfo],
         target_deck_id: Option<DeckId>,
@@ -246,7 +250,10 @@ impl Collection {
         self.add_generated_cards(note.id, &cards, target_deck_id, cache)
     }
 
-    pub(crate) fn generate_cards_for_notetype(&mut self, ctx: &CardGenContext) -> Result<()> {
+    pub(crate) fn generate_cards_for_notetype(
+        &mut self,
+        ctx: &CardGenContext<impl Deref<Target = Notetype>>,
+    ) -> Result<()> {
         let existing_cards = self.storage.existing_cards_for_notetype(ctx.notetype.id)?;
         let by_note = group_generated_cards_by_note(existing_cards);
         let mut cache = CardGenCache::default();

rslib/src/notetype/notetypechange.rs

@@ -255,7 +255,7 @@ impl Collection {
             .get_notetype(new_notetype_id)?
             .ok_or(AnkiError::NotFound)?;
         let last_deck = self.get_last_deck_added_to_for_notetype(notetype.id);
-        let ctx = CardGenContext::new(&notetype, last_deck, usn);
+        let ctx = CardGenContext::new(notetype.as_ref(), last_deck, usn);
 
         for nid in note_ids {
             let mut note = self.storage.get_note(*nid)?.ok_or(AnkiError::NotFound)?;