compact dict benchmark

$ python perf.py -v -b default ../cpython/python ../compact-dict/python
Report on Linux x250 4.4.0-24-generic #43-Ubuntu SMP Wed Jun 8 19:27:37 UTC 2016 x86_64 x86_64
Total CPU cores: 4

### 2to3 ###
7.648000 -> 7.844000: 1.03x slower

### chameleon_v2 ###
Min: 5.495975 -> 5.757828: 1.05x slower
Avg: 5.539950 -> 5.809527: 1.05x slower
Significant (t=-33.20)
Stddev: 0.05019 -> 0.02788: 1.8003x smaller

### django_v3 ###
Min: 0.573310 -> 0.596069: 1.04x slower
Avg: 0.578964 -> 0.628379: 1.09x slower
Significant (t=-5.59)
Stddev: 0.00996 -> 0.06166: 6.1916x larger

### fastpickle ###
Min: 0.537859 -> 0.523110: 1.03x faster
Avg: 0.540418 -> 0.531908: 1.02x faster
Not significant
Stddev: 0.00217 -> 0.02624: 12.0857x larger

### fastunpickle ###
Min: 0.620815 -> 0.636240: 1.02x slower
Avg: 0.626837 -> 0.637664: 1.02x slower
Not significant
Stddev: 0.00986 -> 0.00090: 10.9474x smaller

### json_dump_v2 ###
Min: 2.829142 -> 2.924980: 1.03x slower
Avg: 2.857882 -> 2.934214: 1.03x slower
Significant (t=-37.54)
Stddev: 0.00973 -> 0.01058: 1.0878x larger

### json_load ###
Min: 0.545265 -> 0.535063: 1.02x faster
Avg: 0.553016 -> 0.542960: 1.02x faster
Not significant
Stddev: 0.03192 -> 0.01287: 2.4809x smaller

### nbody ###
Min: 0.285773 -> 0.289056: 1.01x slower
Avg: 0.286893 -> 0.293088: 1.02x slower
Not significant
Stddev: 0.00051 -> 0.02548: 49.8601x larger

### regex_v8 ###
Min: 0.057117 -> 0.057962: 1.01x slower
Avg: 0.058998 -> 0.059572: 1.01x slower
Not significant
Stddev: 0.00217 -> 0.00163: 1.3348x smaller

### tornado_http ###
Min: 0.278361 -> 0.280046: 1.01x slower
Avg: 0.284546 -> 0.286747: 1.01x slower
Not significant
Stddev: 0.00409 -> 0.00402: 1.0187x smaller