1 files changed, 4 insertions, 4 deletions
diff --git a/bnf.h b/bnf.h
index b14ca58..13337bf 100644
--- a/bnf.h
+++ b/bnf.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <deque>
-#include <map>
+#include <unordered_map>
 #include <set>
 #include <string>
 #include <utility>
@@ -9,9 +9,9 @@
 
 using namespace std::string_literals;
 
-using BNF = std::map<std::string, std::vector<std::vector<std::string>>>;
+using BNF = std::unordered_map<std::string, std::vector<std::vector<std::string>>>;
 
-std::map<std::string, std::set<std::string>> Reverse(BNF bnf); // unused now, remove?
-std::map<std::string, std::set<std::string>> reverseFirst(BNF bnf);
+std::unordered_map<std::string, std::set<std::string>> Reverse(BNF bnf); // unused now, remove?
+std::unordered_map<std::string, std::set<std::string>> reverseFirst(BNF bnf);
 
 BNF SubBNF(const BNF& bnf, const std::string& top);