Optimize start lookup

1 files changed, 1 insertions, 2 deletions

diff --git a/grammer.h b/grammer.h
index df7ff8d..9b72d3a 100644
--- a/grammer.h
+++ b/grammer.h
@@ -81,8 +81,7 @@ private:
    return h0 ^ (h1 << 1) ^ (h2 << 2);
   }
  };
- std::unordered_set<std::tuple<std::string, size_t, std::string>, TupleHash> m_start_cache;
- bool canStartWith(const std::string& non_terminal, size_t variant, const std::string& terminal) const;
+ std::unordered_map<std::pair<std::string, std::string>, std::vector<size_t>, PairHashSS> m_match_lut;
  void fillStartCache();
 
  void constructTree();