Benchmark with a loop on lists of strings instead of range()

gistfile1.txt

Code for CPython, Brython and Skulpt : https://gist.github.com/PierreQuentel/50047f7d15b2e7d41516
Code for pypy.js : https://gist.github.com/PierreQuentel/d9b2c037089cd7361d42

                                               | x slower than Cpython        
                Cpython Brython pypy.js skulpt | Brython pypy.js skulpt
assignment          112    1175    3961   5494 |   10.52   35.45  49.18
augm_assign         185    1744    4721   6533 |    9.42   25.51  35.30
assignment_float    117    2244    4112   5795 |   19.23   35.23  49.65
build_dict          369    7582    4398  13805 |   20.53   11.91  37.38
set_dict_item       188    1495    5492  22455 |    7.95   29.20 119.40
build_list          306    1405    4112   6677 |    4.59   13.42  21.79
set_list_item       176    1596    4033   8047 |    9.06   22.88  45.67
add_integers        303    2396    4743   6829 |    7.90   15.63  22.51
add_strings         396    3362    5286   7766 |    8.49   13.34  19.60
str_of_int          407     928    4389  14412 |    2.28   10.78  35.39
create_function     248    7448    4524   7899 |   30.08   18.27  31.91
function_call       324   13549    4248  21985 |   41.86   13.12  67.92