Benchmark CPython2, PyPy, Node.js

gistfile1.txt

$ cat h.py
n = 100000;
d = {};
for _ in xrange(1000):
  for k in xrange(n):
    if k not in d:
      d[k] = k * 2
    else:
      d[k] += 1
print d[n - 1]
$ time python h.py
200997

real    0m22.513s
user    0m22.499s
sys     0m0.008s
$ time pypy h.py
200997

real    0m5.091s
user    0m5.051s
sys     0m0.024s
$ cat h.js
n = 100000;
d = {};
for (i = 0; i < 1000; i++) {
  for (k = 0; k < n; k++) {
    if (!(k in d)) {
      d[k] = k * 2;
    } else {
      d[k] += 1;
    }
  }
}
console.log(d[n - 1]);
$ time nodejs h.js
200997

real    0m2.939s
user    0m3.134s
sys     0m0.043s