[Numpy-discussion] profiling line by line

Robert Kern robert.kern@gmail....
Thu Sep 18 14:37:09 CDT 2008

On Thu, Sep 18, 2008 at 06:01, Robert Cimrman <cimrman3@ntc.zcu.cz> wrote:
> Hi Robert,
> Robert Kern wrote:
>> On Mon, Sep 15, 2008 at 11:13, Arnar Flatberg <arnar.flatberg@gmail.com> wrote:
>>> That would make me an extremely happy user, I've been looking for this for
>>> years!
>>> I can't imagine I'm the only one who profiles some hundred lines of code and
>>> ends up with 90% of total time in the dot-function
>> For the time being, you can grab it here:
>> http://www.enthought.com/~rkern/cgi-bin/hgwebdir.cgi/line_profiler/
>> It requires Cython and a C compiler to build. I'm still debating
>> myself about the desired workflow for using it, but for now, it only
>> profiles functions which you have registered with it. I have made the
>> profiler work as a decorator to make this easy. E.g.,
> many thanks for this! I have wanted to try out the profiler but failed
> to build it (changeset 6 0de294aa75bf):
> $ python setup.py install --root=/home/share/software/
> running install
> running build
> running build_py
> creating build
> creating build/lib.linux-i686-2.4
> copying line_profiler.py -> build/lib.linux-i686-2.4
> running build_ext
> cythoning _line_profiler.pyx to _line_profiler.c
> building '_line_profiler' extension
> creating build/temp.linux-i686-2.4
> i486-pc-linux-gnu-gcc -pthread -fno-strict-aliasing -DNDEBUG -fPIC
> -I/usr/include/python2.4 -c -I/usr/include/python2.4 -c _line_profiler.c
> -o build/temp.linux-i686-2.4/_line_profiler.o
> _line_profiler.c:1614: error: 'T_LONGLONG' undeclared here (not in a
> function)
> error: command 'i486-pc-linux-gnu-gcc' failed with exit status 1
> I have cython- and GCC 4.1.2, 32-bit machine.

It uses the #define'd macro PY_LONG_LONG. Go through your Python
headers to see what this gets expanded to.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
 -- Umberto Eco

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