问题是 pytest 搜索//pytest.ini, //tox.ini, //setup.cfg, and //setup.py。他们每个人都造成了genericpath.exists() or genericpath.isfile()消耗约2.5秒。
修复方法是将下面的行添加到genericpath.exists() and genericpath.isfile()跳过这四个特定路径。
if path.startswith(r'//'):
return False
另一种修复方法是修改_pytest/config.py所以它不会在搜索路径中形成那些双斜杠。
用于找出确切问题的代码粘贴在下面。放myshow = True因此它将显示正在搜索的每个文件的时间消耗情况。
$ diff -u /usr/lib/python2.6/genericpath.py genericpath.py
--- /usr/lib/python2.6/genericpath.py 2012-06-09 08:33:12.000000000 -0700
+++ genericpath.py 2015-06-11 11:46:33.674285900 -0700
@@ -9,14 +9,29 @@
__all__ = ['commonprefix', 'exists', 'getatime', 'getctime', 'getmtime',
'getsize', 'isdir', 'isfile']
+myshow = False
+import time as mytime
+mybasetime = mytime.time()
+def myshowtime():
+ currenttime = mytime.time()
+ tmdiff = currenttime - mybasetime
+ global mybasetime
+ mybasetime = currenttime
+ return tmdiff
# Does a path exist?
# This is false for dangling symbolic links on systems that support them.
def exists(path):
"""Test whether a path exists. Returns False for broken symbolic links"""
+ pretime = myshowtime()
+ if path.startswith(r'//'):
+ if myshow: print "\n genericpath exists %8.3f %8.3f False " % (pretime, myshowtime()), " ", path, "\n"
+ return False
try:
st = os.stat(path)
+ if myshow: print "\n genericpath exists %8.3f %8.3f True " % (pretime, myshowtime()), " ", path, "\n"
except os.error:
+ if myshow: print "\n genericpath exists %8.3f %8.3f False " % (pretime, myshowtime()), " ", path, "\n"
return False
return True
@@ -25,9 +40,15 @@
# for the same path ono systems that support symlinks
def isfile(path):
"""Test whether a path is a regular file"""
+ pretime = myshowtime()
+ if path.startswith(r'//'):
+ if myshow: print "\n genericpath isfile %8.3f %8.3f False " % (pretime, myshowtime()), " ", path, "\n"
+ return False
try:
st = os.stat(path)
+ if myshow: print "\n genericpath isfile %8.3f %8.3f True " % (pretime, myshowtime()), " ", path, "\n"
except os.error:
+ if myshow: print "\n genericpath isfile %8.3f %8.3f False " % (pretime, myshowtime()), " ", path, "\n"
return False
return stat.S_ISREG(st.st_mode)
