Significant performance diffs are:
+-------------------------+--------------+--------------+--------------+------------------------+
| Benchmark | py385_1.json | py385_2.json | Change | Significance |
+=========================+==============+==============+==============+========================+
| deltablue | 9.66 ms | 9.40 ms | 1.03x faster | Significant (t=4.83) |
+-------------------------+--------------+--------------+--------------+------------------------+
| dulwich_log | 97.0 ms | 101 ms | 1.04x slower | Significant (t=-7.90) |
+-------------------------+--------------+--------------+--------------+------------------------+
| fannkuch | 595 ms | 573 ms | 1.04x faster | Significant (t=43.63) |
+-------------------------+--------------+--------------+--------------+------------------------+
| genshi_xml | 76.9 ms | 78.7 ms | 1.02x slower | Significant (t=-7.62) |
+-------------------------+--------------+--------------+--------------+------------------------+
| hexiom | 12.6 ms | 12.3 ms | 1.03x faster | Significant (t=19.79) |
+-------------------------+--------------+--------------+--------------+------------------------+
| json_loads | 33.8 us | 35.4 us | 1.05x slower | Significant (t=-3.47) |
+-------------------------+--------------+--------------+--------------+------------------------+
| logging_format | 13.0 us | 13.3 us | 1.02x slower | Significant (t=-4.94) |
+-------------------------+--------------+--------------+--------------+------------------------+
| nbody | 167 ms | 157 ms | 1.06x faster | Significant (t=44.36) |
+-------------------------+--------------+--------------+--------------+------------------------+
| nqueens | 125 ms | 122 ms | 1.03x faster | Significant (t=14.85) |
+-------------------------+--------------+--------------+--------------+------------------------+
| pickle | 10.4 us | 9.94 us | 1.05x faster | Significant (t=17.78) |
+-------------------------+--------------+--------------+--------------+------------------------+
| pickle_dict | 29.0 us | 28.0 us | 1.04x faster | Significant (t=12.38) |
+-------------------------+--------------+--------------+--------------+------------------------+
| pickle_pure_python | 601 us | 588 us | 1.02x faster | Significant (t=6.57) |
+-------------------------+--------------+--------------+--------------+------------------------+
| pyflate | 873 ms | 847 ms | 1.03x faster | Significant (t=9.77) |
+-------------------------+--------------+--------------+--------------+------------------------+
| python_startup | 13.4 ms | 13.7 ms | 1.02x slower | Significant (t=-3.06) |
+-------------------------+--------------+--------------+--------------+------------------------+
| raytrace | 662 ms | 647 ms | 1.02x faster | Significant (t=8.24) |
+-------------------------+--------------+--------------+--------------+------------------------+
| richards | 92.3 ms | 89.5 ms | 1.03x faster | Significant (t=10.90) |
+-------------------------+--------------+--------------+--------------+------------------------+
| scimark_fft | 467 ms | 453 ms | 1.03x faster | Significant (t=11.29) |
+-------------------------+--------------+--------------+--------------+------------------------+
| scimark_lu | 210 ms | 202 ms | 1.04x faster | Significant (t=19.89) |
+-------------------------+--------------+--------------+--------------+------------------------+
| scimark_monte_carlo | 138 ms | 133 ms | 1.04x faster | Significant (t=16.20) |
+-------------------------+--------------+--------------+--------------+------------------------+
| scimark_sor | 262 ms | 256 ms | 1.02x faster | Significant (t=9.11) |
+-------------------------+--------------+--------------+--------------+------------------------+
| scimark_sparse_mat_mult | 5.83 ms | 5.24 ms | 1.11x faster | Significant (t=133.99) |
+-------------------------+--------------+--------------+--------------+------------------------+
| spectral_norm | 178 ms | 174 ms | 1.03x faster | Significant (t=10.68) |
+-------------------------+--------------+--------------+--------------+------------------------+
| unpickle | 18.3 us | 16.1 us | 1.14x faster | Significant (t=10.51) |
+-------------------------+--------------+--------------+--------------+------------------------+
| unpickle_list | 4.33 us | 4.60 us | 1.06x slower | Significant (t=-33.27) |
+-------------------------+--------------+--------------+--------------+------------------------+