update benchmark

src/tests/bench.py

@@ -1,14 +1,14 @@
 #!/usr/bin/env python
 # coding: utf-8
 
+import time
+
 import cchardet
 import chardet
 
 
-class TestCchardetSpeed():
-    def test_speed(self):
-        import time
-        do_times = 5
+def main():
+    do_times = 100
     path = r'tests/testdata/wikipediaJa_One_Thousand_and_One_Nights_SJIS.txt'
     with open(path, 'rb') as f:
         msg = f.read()
@@ -28,3 +28,6 @@ class TestCchardetSpeed():
             cchardet.detect(msg)
             result_cchardet += (time.time() - start_cchardet)
         print('cchardet:', 1 / (result_cchardet / do_times), 'call(s)/s')
+
+if __name__ == '__main__':
+    main()