David Cournapeau wrote: > V. Armando Solé wrote: > >> Hello, >> >> I have found performance problems under windows when using python 2.6 >> In my case, they seem to be related to the dot product. >> >> The following simple script: >> >> import numpy >> import time >> a=numpy.arange(1000000.) >> a.shape=1000,1000 >> t0=time.time() >> b=numpy.dot(a.T,a) >> print "Elapsed time = ",time.time()-t0 >> >> reports an "Elapsed time" of 1.4 seconds under python 2.5 and 15 seconds >> under python 2.6 >> >> Same version of numpy, same machine, official numpy installers for >> windows (both with nosse flag) >> >> > > Could you confirm this by pasting the output of numpy.show_config() in > both versions The output of:
python -c "import numpy; import sys; print sys.executable;numpy.show_config()" > python26.txt and python -c "import numpy; import sys; print sys.executable; numpy.show_config()" > python25.txt are identical except for the first line: diff python25.txt python26.txt 1c1 < C:\Python25\python.exe --- > C:\Python26\python.exe I paste the python26.txt because the other one is the same except for the first line: C:\Python26\python.exe blas_info: libraries = ['blas'] library_dirs = ['C:\\local\\lib\\yop\\nosse'] language = f77 lapack_info: libraries = ['lapack'] library_dirs = ['C:\\local\\lib\\yop\\nosse'] language = f77 atlas_threads_info: NOT AVAILABLE blas_opt_info: libraries = ['blas'] library_dirs = ['C:\\local\\lib\\yop\\nosse'] language = f77 define_macros = [('NO_ATLAS_INFO', 1)] atlas_blas_threads_info: NOT AVAILABLE lapack_opt_info: libraries = ['lapack', 'blas'] library_dirs = ['C:\\local\\lib\\yop\\nosse'] language = f77 define_macros = [('NO_ATLAS_INFO', 1)] atlas_info: NOT AVAILABLE lapack_mkl_info: NOT AVAILABLE blas_mkl_info: NOT AVAILABLE atlas_blas_info: NOT AVAILABLE mkl_info: NOT AVAILABLE Any hint? Armando _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion