Add test of dict over string.

bench/bench-stl.cpp

@@ -7,6 +7,8 @@
 #include <set>
 #include <unordered_map>
 #include <algorithm>
+#include <string>
+#include <sstream>
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -190,6 +192,29 @@ test_dict_big(unsigned long  n)
   g_result = s;
 }
 
+/********************************************************************************************/
+static void
+test_dict_str(unsigned long  n)
+{
+  rand_init();
+  unordered_map<string, string> dict;
+
+  for (size_t i = 0; i < n; i++) {
+    string s1 = static_cast<ostringstream*>( &(ostringstream() << rand_get()) )->str();
+    string s2 = static_cast<ostringstream*>( &(ostringstream() << rand_get()) )->str();
+    dict[s1] = s2;
+  }
+  rand_init();
+  unsigned int s = 0;
+  for (size_t i = 0; i < n; i++) {
+    string s1 = static_cast<ostringstream*>( &(ostringstream() << rand_get()) )->str();
+    unordered_map<string, string>::iterator it = dict.find(s1);
+    if (it != dict.end())
+      s ++;
+  }
+  g_result = s;
+}
+
 /********************************************************************************************/
 
 static void test_sort(size_t n)
@@ -222,4 +247,6 @@ int main(int argc, const char *argv[])
     test_function("DictB  time", 1000000, test_dict_big);
   if (n == 7)
     test_function("Sort   time", 10000000, test_sort);
+  if (n == 8)
+    test_function("DictS  time", 1000000, test_dict_str);
 }