我正在使用nose2运行我项目的测试：
#!/bin/sh
nose2 --config=tests/nose2.cfg "$@"
在CPython测试下，运行速度比PyPy快4倍：
Python 2.7.8 (default, Oct 20 2014, 15:05:19)
[GCC 4.9.1] on linux2
...
Ran 58 tests in 25.369s
Python 2.7.9 (2.5.1+dfsg-1~ppa1+ubuntu14.04, Mar 27 2015, 19:19:42)
[PyPy 2.5.1 with GCC 4.8.2] on linux2
...
Ran 58 tests in 100.854s
可能是什么原因？
有没有办法在某些标准路径上使用环境变量或配置文件来调整PyPy配置？因为在我的情况下，我正在运行nose引导脚本，我无法控制PyPy的命令行选项。
以下是一项具体测试：
1272695 function calls (1261234 primitive calls) in 1.165 seconds
Ordered by: cumulative time, internal time, call count
List reduced from 1224 to 40 due to restriction <40>
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 1.171 1.171 test_progress.py:37(test_progress)
15 0.000 0.000 1.169 0.078 __init__.py:52(api_request)
15 0.000 0.000 1.160 0.077 __init__.py:46(request)
15 0.000 0.000 1.152 0.077 test.py:695(open)
15 0.000 0.000 1.150 0.077 test.py:655(run_wsgi_app)
15 0.000 0.000 1.144 0.076 test.py:828(run_wsgi_app)
15 0.000 0.000 1.144 0.076 application.py:101(__call__)
15 0.000 0.000 1.138 0.076 sessions.py:329(__call__)
15 0.000 0.000 1.071 0.071 course_object.py:14(__call__)
15 0.000 0.000 1.005 0.067 user_auth.py:7(__call__)
15 0.000 0.000 0.938 0.063 application.py:27(application)
15 0.000 0.000 0.938 0.063 application.py:81(wsgi_app)
15 0.000 0.000 0.876 0.058 ember_backend.py:188(__call__)
15 0.000 0.000 0.875 0.058 ember_backend.py:233(handle_request)
176 0.002 0.000 0.738 0.004 __init__.py:42(instrumented_method)
176 0.003 0.000 0.623 0.004 __init__.py:58(get_stack)
176 0.000 0.000 0.619 0.004 inspect.py:1053(stack)
176 0.010 0.000 0.619 0.004 inspect.py:1026(getouterframes)
294 0.001 0.000 0.614 0.002 cursor.py:1072(next)
248 0.001 0.000 0.612 0.002 cursor.py:998(_refresh)
144 0.002 0.000 0.608 0.004 cursor.py:912(__send_message)
7248 0.041 0.000 0.607 0.000 inspect.py:988(getframeinfo)
8 0.000 0.000 0.544 0.068 test_progress.py:31(get_progress_data)
4 0.000 0.000 0.529 0.132 test_progress.py:25(finish_item)
249 0.001 0.000 0.511 0.002 base.py:1131(next)
7 0.000 0.000 0.449 0.064 ember_backend.py:240(_handle_request)
8 0.000 0.000 0.420 0.053 ember_backend.py:307(_handle_request)
8 0.000 0.000 0.420 0.053 user_state.py:13(list)
8 0.001 0.000 0.407 0.051 user_progress.py:28(update_progress)
4 0.000 0.000 0.397 0.099 entity.py:253(post)
7248 0.051 0.000 0.362 0.000 inspect.py:518(findsource)
14532 0.083 0.000 0.332 0.000 inspect.py:440(getsourcefile)
92/63 0.000 0.000 0.308 0.005 objects.py:22(__get__)
61 0.001 0.000 0.304 0.005 base.py:168(get)
139 0.000 0.000 0.250 0.002 queryset.py:65(_iter_results)
51 0.001 0.000 0.249 0.005 queryset.py:83(_populate_cache)
29 0.000 0.000 0.220 0.008 __init__.py:81(save)
29 0.001 0.000 0.219 0.008 document.py:181(save)
21780 0.051 0.000 0.140 0.000 inspect.py:398(getfile)
32 0.002 0.000 0.139 0.004 {pymongo._cmessage._do_batched_write_command}
与PyPy：
6037905 function calls (6012014 primitive calls) in 7.475 seconds
Ordered by: cumulative time, internal time, call count
List reduced from 1354 to 40 due to restriction <40>
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 7.960 7.960 test_progress.py:37(test_progress)
15 0.000 0.000 7.948 0.530 __init__.py:52(api_request)
15 0.000 0.000 7.873 0.525 __init__.py:46(request)
15 0.000 0.000 7.860 0.524 test.py:695(open)
15 0.000 0.000 7.856 0.524 test.py:655(run_wsgi_app)
15 0.000 0.000 7.845 0.523 test.py:828(run_wsgi_app)
15 0.000 0.000 7.844 0.523 application.py:101(__call__)
15 0.000 0.000 7.827 0.522 sessions.py:329(__call__)
15 0.000 0.000 7.205 0.480 course_object.py:14(__call__)
176 0.004 0.000 6.605 0.038 __init__.py:42(instrumented_method)
15 0.000 0.000 6.591 0.439 user_auth.py:7(__call__)
176 0.008 0.000 6.314 0.036 __init__.py:58(get_stack)
176 0.001 0.000 6.305 0.036 inspect.py:1063(stack)
176 0.027 0.000 6.304 0.036 inspect.py:1036(getouterframes)
7839 0.081 0.000 6.274 0.001 inspect.py:998(getframeinfo)
15 0.000 0.000 5.983 0.399 application.py:27(application)
15 0.001 0.000 5.983 0.399 application.py:81(wsgi_app)
15 0.000 0.000 5.901 0.393 ember_backend.py:188(__call__)
15 0.000 0.000 5.899 0.393 ember_backend.py:233(handle_request)
15714/15713 0.189 0.000 5.828 0.000 inspect.py:441(getsourcefile)
294 0.002 0.000 5.473 0.019 cursor.py:1072(next)
248 0.002 0.000 5.470 0.022 cursor.py:998(_refresh)
144 0.004 0.000 5.445 0.038 cursor.py:912(__send_message)
8367 2.133 0.000 5.342 0.001 inspect.py:473(getmodule)
249 0.002 0.000 4.316 0.017 base.py:1131(next)
8 0.000 0.000 3.966 0.496 test_progress.py:31(get_progress_data)
4 0.000 0.000 3.209 0.802 test_progress.py:25(finish_item)
7839 0.098 0.000 3.185 0.000 inspect.py:519(findsource)
7 0.000 0.000 2.944 0.421 ember_backend.py:240(_handle_request)
8 0.000 0.000 2.898 0.362 ember_backend.py:307(_handle_request)
8 0.000 0.000 2.898 0.362 user_state.py:13(list)
8 0.001 0.000 2.820 0.352 user_progress.py:28(update_progress)
61 0.001 0.000 2.546 0.042 base.py:168(get)
4 0.000 0.000 2.534 0.633 entity.py:253(post)
850362/849305 2.315 0.000 2.344 0.000 {hasattr}
92/63 0.001 0.000 2.004 0.032 objects.py:22(__get__)
127 0.001 0.000 1.915 0.015 queryset.py:65(_iter_results)
51 0.001 0.000 1.914 0.038 queryset.py:83(_populate_cache)
29 0.000 0.000 1.607 0.055 __init__.py:81(save)
29 0.001 0.000 1.605 0.055 document.py:181(save)