Hi All
I have code that iterate on directory tree (the recursive function)
addFolder. I had profiled it (MSVC 6.5)
Func Func+Child Hit
Time % Time % Count Function
---------------------------------------------------------
28.780 43.2 31.818 47.8 567
boost::filesystem::is_directory(class boost::filesystem::path const &)
(operations_posix_windows.obj)
10.136 15.2 22.666 34.0 151
boost::filesystem::directory_iterator::directory_iterator(class
boost::filesystem::path const &) (operations_posix_windows.obj)
7.249 10.9 7.249 10.9 592 `anonymous
namespace'::find_next_file(void *,class boost::filesystem::path const
&,struct _WIN32_FIND_DATAA &) (operations_posix_windows.obj)
(operations_posix_windows.obj)
As you can see most of the time is spent in the is_directory function. I
know that (in Win32 - ::FindNextFileA at least) the information for
"is_directory" can be fetched in the "::find_next_file". I suggest to add
m_is_directory attribute to the path class (initial value "unknown") and
have is_directory read from this attribute if possible. (For my application
the is_directory time is swamped by other things but for other directory
iterating applications this may be significant)
profiled function:
addFolder(const fs::path &folder) {
if (!fs::is_directory(folder)) {
throw std::domain_error("Folder "+ folder.native_file_string() + " should
have been directory");
};
fs::directory_iterator begin(folder);
for (fs::directory_iterator it = begin; it != fs::directory_iterator();
it++) {
if (fs::is_directory(*it)) {
addFolder(*it);
} else {
//Do something
}
};
};
Cheers
Daniel Yerushalmi
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