Split keys and slots and allocate them both together

src/string.cpp

@@ -182,8 +182,9 @@ gb_internal isize string_index_byte(String const &s, u8 x) {
 }
 
 gb_internal gb_inline bool str_eq(String const &a, String const &b) {
-	if (a.len != b.len) return false;
-	if (a.len == 0) return true;
+	if (a.len != b.len)   return false;
+	if (a.len == 0)       return true;
+	if (a.text == b.text) return true;
 	return memcmp(a.text, b.text, a.len) == 0;
 }
 gb_internal gb_inline bool str_ne(String const &a, String const &b) { return !str_eq(a, b);                }