diff --git a/crates/generate/src/build_tables/build_parse_table.rs b/crates/generate/src/build_tables/build_parse_table.rs
index 8869d4e6d..133508077 100644
--- a/crates/generate/src/build_tables/build_parse_table.rs
+++ b/crates/generate/src/build_tables/build_parse_table.rs
@@ -15,7 +15,7 @@ use super::{
 };
 use crate::{
     Diagnostic,
-    build_tables::item::{LookaheadSetPool, prec_display},
+    build_tables::item::{LookaheadSetPool, START_PRODUCTION_ID, prec_display},
     grammars::{LexicalGrammar, PrecedenceEntry, ReservedWordSetId, SyntaxGrammar, VariableType},
     node_types::VariableInfo,
     rules::{Associativity, Precedence, Symbol, SymbolType, TokenSet},
@@ -73,6 +73,7 @@ struct ParseTableBuilder<'a> {
     core_ids_by_core: FxHashMap<ParseItemSetCore<'a>, usize>,
     state_ids_by_item_set: IndexMap<ParseItemSet<'a>, ParseStateId, BuildHasherDefault<FxHasher>>,
     preceding_symbols_by_id: Vec<SymbolSequence>,
+    production_info_ids_by_prod_id: Vec<Option<ProductionInfoId>>,
     parse_state_queue: VecDeque<ParseStateQueueEntry>,
     non_terminal_extra_states: Vec<(Symbol, usize)>,
     actual_conflicts: FxHashSet<Vec<Symbol>>,
@@ -270,6 +271,7 @@ impl<'a> ParseTableBuilder<'a> {
             state_ids_by_item_set: IndexMap::default(),
             core_ids_by_core: FxHashMap::default(),
             preceding_symbols_by_id: Vec::new(),
+            production_info_ids_by_prod_id: vec![None; syntax_grammar.productions.len()],
             parse_state_queue: VecDeque::new(),
             actual_conflicts: syntax_grammar.expected_conflicts.iter().cloned().collect(),
             parse_table: ParseTable {
@@ -1138,6 +1140,10 @@ impl<'a> ParseTableBuilder<'a> {
     }
 
     fn get_production_id(&mut self, item: &ParseItem) -> ProductionInfoId {
+        debug_assert_ne!(item.prod_id, START_PRODUCTION_ID);
+        if let Some(id) = self.production_info_ids_by_prod_id[item.prod_id as usize] {
+            return id;
+        }
         let mut production_info = ProductionInfo {
             alias_sequence: Vec::new(),
             field_map: BTreeMap::new(),
@@ -1191,7 +1197,7 @@ impl<'a> ParseTableBuilder<'a> {
                 item.production(self.syntax_grammar).steps.len();
         }
 
-        if let Some(index) = self
+        let id = if let Some(index) = self
             .parse_table
             .production_infos
             .iter()
@@ -1201,7 +1207,9 @@ impl<'a> ParseTableBuilder<'a> {
         } else {
             self.parse_table.production_infos.push(production_info);
             self.parse_table.production_infos.len() - 1
-        }
+        };
+        self.production_info_ids_by_prod_id[item.prod_id as usize] = Some(id);
+        id
     }
 
     fn symbol_name(&self, symbol: Symbol) -> String {