[mnet-devel] fast dump to mencode format

[Zooko]

I've added C and Python implementations of "dump a dict containing only 
strings to mencode format".  Disappointingly, it is noticeably slower than the 
minimal binary format:

HACK pion:~/playground/mnet/mnet_new$ /usr/local/stow/python2.3-O2-athlon-xp/bin/python -OO ~/playground/mnet/mnet_new/mnetlib/scripts/benchpickle.py
NOTE: c_mencode found, using accelerated C version of mencode
NOTE: c_fastdumper found, using accelerated C version of fastdumper
cstringdictdumps
N:   16384, time: ave:    0.01,   5th-best:    0.01,   5th-worst:    0.01 (of 128), ave rate:  1814218
N:   65536, time: ave:    0.04,   5th-best:    0.04,   5th-worst:    0.04 (of 128), ave rate:  1745717
N:  262144, time: ave:    0.16,   5th-best:    0.16,   5th-worst:    0.17 (of 128), ave rate:  1658501
N: 1048576, time: ave:    0.68,   5th-best:    0.67,   5th-worst:    0.69 (of  80), ave rate:  1552074
cstringdictdumpsmencode
N:   16384, time: ave:    0.04,   5th-best:    0.04,   5th-worst:    0.04 (of 128), ave rate:   448628
N:   65536, time: ave:    0.15,   5th-best:    0.14,   5th-worst:    0.16 (of 128), ave rate:   441444
N:  262144, time: ave:    0.60,   5th-best:    0.59,   5th-worst:    0.62 (of 100), ave rate:   434666
N: 1048576, time: ave:    2.45,   4th-best:    2.43,   4th-worst:    2.47 (of  25), ave rate:   428697




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