pytest（py.test）在cygwin中启动非常慢

pytest（py.test）在cygwin中启动非常慢

问题是对于pytest搜索

//pytest.ini

，

//tox.ini

，

//setup.cfg

，和

//setup.py

。他们每个人造成

genericpath.exists()

或

genericpath.isfile()

消耗了大约2.5秒。

解决的办法是在下面添加以下行，

genericpath.exists()

并

genericpath.isfile()

跳过这四个特定路径。

if path.startswith(r'//'):    return False

另一种解决方法是修改

_pytest/config.py

，使其不会在搜索路径中形成双斜杠。

用于查找确切问题的代码粘贴在下面。进行设置

myshow = True

以显示要搜索的每个文件的时间消耗。

$ 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)