I'm trying to profile my Cython extension. I'm using Cython 0.15.1 and
followed the instructions on
http://docs.cython.org/src/tutorial/profiling_tutorial.html:

I have added

# cython: profile=True

to the top of my .pyx file and compiled it with 'cython -v -Wextra' and

gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python2.7 -c src/s3ql/deltadump.c -o build/temp.linux-x86_64-2.7/src/s3ql/deltadump.o -Wall -Wextra -Wconversion -Wno-sign-conversion -Werror=conversion -Wno-unused-parameter -Wno-unused-but-set-variable -fno-strict-aliasing
gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions build/temp.linux-x86_64-2.7/src/s3ql/deltadump.o -o build/lib.linux-x86_64-2.7/s3ql/deltadump.so -lsqlite3

Then I wrapped a function that calls my extension module into
cProfile.runctx().

However, when looking at the profiling information, there is nothing
from the Cython level, only the one call into the module:
(s3ql.deltadump.dump_delta):

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
   [...]
        1    3.286    3.286    3.476    3.476 {s3ql.deltadump.dump_delta}
   [...]

What am I doing wrong?

Thanks,

   -Nikolaus

--
 »Time flies like an arrow, fruit flies like a Banana.«

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