metamagic.json vs ujson

gistfile1.txt

-[ timing tests ]------------------------------
Array with 256 short ascii strings:
  std json:  2.65893 sec,      11282 req/sec
 mm c json:  0.89771 sec,      33418 req/sec  ( 3.0x )
 mm c 1ini:  0.86308 sec,      34759 req/sec  ( 3.1x )
mm c dumpb:  0.88435 sec,      33923 req/sec  ( 3.0x )
     ujson:  2.01593 sec,      14881 req/sec  ( 1.3x )
   marshal:  1.77637 sec,      16888 req/sec
Array with 2048 3-char ascii strings:
  std json:  0.46795 sec,       4273 req/sec
 mm c json:  0.12213 sec,      16375 req/sec  ( 3.8x )
 mm c 1ini:  0.12087 sec,      16546 req/sec  ( 3.9x )
mm c dumpb:  0.12081 sec,      16554 req/sec  ( 3.9x )
     ujson:  0.57373 sec,       3485 req/sec  ( 0.8x )
   marshal:  0.38574 sec,       5184 req/sec
Array with 256 long ascii strings:
  std json:  1.31176 sec,       3811 req/sec
 mm c json:  0.42728 sec,      11701 req/sec  ( 3.1x )
 mm c 1ini:   0.4415 sec,      11325 req/sec  ( 3.0x )
mm c dumpb:  0.42976 sec,      11634 req/sec  ( 3.1x )
     ujson:  0.68999 sec,       7246 req/sec  ( 1.9x )
   marshal:  0.81957 sec,       6100 req/sec
Array with 256 long utf-8 strings:
  std json:   1.5042 sec,       1329 req/sec
 mm c json:  1.47078 sec,       1359 req/sec  ( 1.0x )
 mm c 1ini:  1.47409 sec,       1356 req/sec  ( 1.0x )
mm c dumpb:  1.42876 sec,       1399 req/sec  ( 1.1x )
     ujson:    2.473 sec,        808 req/sec  ( 0.6x )
   marshal:  1.32233 sec,       1512 req/sec
Medium complex object:
  std json:  3.47718 sec,       2875 req/sec
 mm c json:  1.37736 sec,       7260 req/sec  ( 2.5x )
 mm c 1ini:  1.37649 sec,       7264 req/sec  ( 2.5x )
mm c dumpb:  1.35585 sec,       7375 req/sec  ( 2.6x )
     ujson:  1.26684 sec,       7893 req/sec  ( 2.7x )
   marshal:  1.00874 sec,       9913 req/sec
Array with 256 doubles:
  std json:  3.37377 sec,       2964 req/sec
 mm c json:  2.20136 sec,       4542 req/sec  ( 1.5x )
 mm c 1ini:   2.9853 sec,       3349 req/sec  ( 1.1x )
mm c dumpb:  2.77406 sec,       3604 req/sec  ( 1.2x )
     ujson:  0.31939 sec,      31309 req/sec  ( 10.6x )
   marshal:  0.14199 sec,      70427 req/sec
Array with 256 ints:
  std json:   1.1378 sec,      17577 req/sec
 mm c json:   0.2816 sec,      71022 req/sec  ( 4.0x )
 mm c 1ini:  0.25926 sec,      77142 req/sec  ( 4.4x )
mm c dumpb:  0.28709 sec,      69664 req/sec  ( 4.0x )
     ujson:   0.4089 sec,      48911 req/sec  ( 2.8x )
   marshal:  0.14832 sec,     134843 req/sec
Array with 256 small ints:
  std json:   1.2062 sec,     165809 req/sec
 mm c json:  0.31506 sec,     634799 req/sec  ( 3.8x )
 mm c 1ini:  0.10601 sec,    1886614 req/sec  ( 11.4x )
mm c dumpb:  0.29149 sec,     686129 req/sec  ( 4.1x )
     ujson:  0.10513 sec,    1902406 req/sec  ( 11.5x )
   marshal:  0.09095 sec,    2199010 req/sec
Array with 256 Decimals:
  std json:     failed to serialize
 mm c json:  0.85002 sec,       9411 req/sec  ( 0.0x )
 mm c 1ini:  0.94584 sec,       8458 req/sec  ( 0.0x )
mm c dumpb:  0.85354 sec,       9372 req/sec  ( 0.0x )
    ujson: crashed with Maximum recursion level reached
   marshal:     failed to serialize
Array with 256 True values:
  std json:  2.31936 sec,      34492 req/sec
 mm c json:  0.63926 sec,     125144 req/sec  ( 3.6x )
 mm c 1ini:  0.40111 sec,     199446 req/sec  ( 5.8x )
mm c dumpb:  0.49052 sec,     163092 req/sec  ( 4.7x )
     ujson:  1.01391 sec,      78902 req/sec  ( 2.3x )
   marshal:  0.27062 sec,     295617 req/sec
Array with 256 False values:
  std json:  1.96338 sec,      40746 req/sec
 mm c json:  0.48973 sec,     163355 req/sec  ( 4.0x )
 mm c 1ini:  0.41958 sec,     190666 req/sec  ( 4.7x )
mm c dumpb:   0.4561 sec,     175400 req/sec  ( 4.3x )
     ujson:  0.96084 sec,      83260 req/sec  ( 2.0x )
   marshal:  0.24616 sec,     324991 req/sec
Array with 256 dict{string, int} pairs:
  std json:  1.70611 sec,       4689 req/sec
 mm c json:  0.36205 sec,      22096 req/sec  ( 4.7x )
 mm c 1ini:  0.35202 sec,      22725 req/sec  ( 4.8x )
mm c dumpb:  0.34907 sec,      22918 req/sec  ( 4.9x )
     ujson:  0.59559 sec,      13432 req/sec  ( 2.9x )
   marshal:  0.52467 sec,      15247 req/sec
Array with 256 dict-based{string, int} pairs:
  std json:  3.98171 sec,       2009 req/sec
 mm c json:  3.62291 sec,       2208 req/sec  ( 1.1x )
 mm c 1ini:  3.58263 sec,       2232 req/sec  ( 1.1x )
mm c dumpb:  3.76489 sec,       2124 req/sec  ( 1.1x )
     ujson:  0.58567 sec,      13659 req/sec  ( 6.8x )
   marshal:     failed to serialize
Array with 256 orderedDict{string, int} pairs:
  std json:  2.20037 sec,        454 req/sec
 mm c json:  0.68094 sec,       1468 req/sec  ( 3.2x )
 mm c 1ini:  0.68384 sec,       1462 req/sec  ( 3.2x )
mm c dumpb:  0.65653 sec,       1523 req/sec  ( 3.4x )
     ujson:  0.22893 sec,       4368 req/sec  ( 9.6x )
   marshal:     failed to serialize
Dict with 256 arrays with 256 dict{string, int} pairs:
  std json:  3.58892 sec,         13 req/sec
 mm c json:  0.67028 sec,         74 req/sec  ( 5.4x )
 mm c 1ini:  0.73365 sec,         68 req/sec  ( 4.9x )
mm c dumpb:  0.66326 sec,         75 req/sec  ( 5.4x )
     ujson:  1.20702 sec,         41 req/sec  ( 3.0x )
   marshal:  1.01116 sec,         49 req/sec