[issue26647] ceval: use Wordcode, 16-bit bytecode

[Raymond Hettinger]

Raymond Hettinger added the comment:

Report on Darwin Raymonds-2013-MacBook-Pro.local 15.4.0 Darwin Kernel Version 15.4.0: Fri Feb 26 22:08:05 PST 2016; root:xnu-3248.40.184~3/RELEASE_X86_64 x86_64 i386
Total CPU cores: 8

### 2to3 ###
Min: 4.680941 -> 4.437426: 1.05x faster
Avg: 4.703692 -> 4.498773: 1.05x faster
Significant (t=9.57)
Stddev: 0.02670 -> 0.03972: 1.4874x larger

### chameleon_v2 ###
Min: 3.391806 -> 3.300793: 1.03x faster
Avg: 3.447192 -> 3.340437: 1.03x faster
Significant (t=28.26)
Stddev: 0.03141 -> 0.02098: 1.4972x smaller

### django_v3 ###
Min: 0.339693 -> 0.328680: 1.03x faster
Avg: 0.347655 -> 0.335704: 1.04x faster
Significant (t=16.97)
Stddev: 0.00477 -> 0.00518: 1.0871x larger

### nbody ###
Min: 0.159703 -> 0.148231: 1.08x faster
Avg: 0.164307 -> 0.152380: 1.08x faster
Significant (t=34.06)
Stddev: 0.00260 -> 0.00234: 1.1123x smaller

The following not significant results are hidden, use -v to show them:
fastpickle, fastunpickle, json_dump_v2, json_load, regex_v8, tornado_http.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26647>
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