I can create a ticket, but I would like first to be sure that is a real issue.
Frédéric Le lundi 26 août 2019 11:29:44 UTC+2, Simon King a écrit : > > Hi all, > > did someone open a ticket for that issue? > > Best regards, > Simon > > > On 2019-08-24, Nils Bruin <nbr...@sfu.ca <javascript:>> wrote: > > It seems to be spending a lot of time in cython code, so "%crun" might > give > > the best idea. This is part of the profile obtained by running the > "copy" > > command 20 times: > > > > 0 0.0% 1.3% 2575 98.2% > > > __pyx_pw_4sage_6matrix_21matrix_integer_sparse_21Matrix_integer_sparse_5__init__ > > > > 27 1.0% 2.4% 2271 86.6% > > __pyx_f_4sage_7modules_21vector_integer_sparse_mpz_vector_set_entry > > 0 0.0% 2.4% 1719 65.6% PyRun_FileExFlags > > 24 0.9% 3.3% 1290 49.2% > > __pyx_f_4sage_7modules_21vector_integer_sparse_allocate_mpz_vector > > 213 8.1% 11.4% 1201 45.8% sig_malloc (inline) > > 0 0.0% 11.4% 1193 45.5% PyRun_SimpleFileExFlags > > 27 1.0% 12.4% 957 36.5% __gmpz_init > > 38 1.4% 13.9% 930 35.5% > > __pyx_f_4sage_3ext_6memory_sage_sig_malloc > > 316 12.1% 25.9% 828 31.6% __GI___libc_malloc > > 163 6.2% 32.2% 751 28.7% sig_free (inline) > > 5 0.2% 32.4% 733 28.0% > > __pyx_f_4sage_3ext_6memory_sage_sig_free > > 0 0.0% 32.4% 705 26.9% Py_Main > > 323 12.3% 44.7% 512 19.5% _int_malloc > > 336 12.8% 57.5% 340 13.0% _int_free > > 334 12.7% 70.2% 334 12.7% sig_unblock (inline) > > > > There's no obvious culprit to my eye. It looks like a lot of time is > spent > > in memory allocation and in setting of entries. Using a boolean matrix > > could be much more efficient. > > > > On Saturday, August 24, 2019 at 3:47:25 AM UTC-7, Frédéric Chapoton > wrote: > >> > >> Hello, > >> > >> With sage 8.9.b7 under py3, I get > >> > >> sage: P = posets.TamariLattice(8) > >> sage: H = P._hasse_diagram > >> sage: L = H.lequal_matrix() > >> sage: %time copy(L) > >> CPU times: user 2.71 s, sys: 4.01 ms, total: 2.71 s > >> Wall time: 2.71 s > >> 1430 x 1430 sparse matrix over Integer Ring (use the '.str()' method to > >> see the entries) > >> > >> And this seems to me to be a bit too much. But maybe I am wrong ? This > >> comes from here: > >> > >> sage: ms = L.parent() > >> sage: ec = ms.element_class > >> sage: d = L.dict() > >> sage: %timeit ec(ms, entries=d, coerce=False, copy=False) > >> 1 loop, best of 5: 2.63 s per loop > >> > >> Any idea on what is happening ? on how to improve the situation ? > >> > >> cheers, > >> Frédéric > >> > > > > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/76162260-12ec-44a7-b0da-14d61e1ce552%40googlegroups.com.
