Thanks for trying that out. I had never heard of pympler before. The current caching mechanism is based on hashing. By my tests, 'pympler.asizeof' is 500-1000x slower than hashing. That's a strong deficit for cachey to overcome (as far as sympy objects are concerned).
In [1]: import sympy In [2]: from sympy.abc import a, b, c, d, e, x, y In [3]: from pympler.asizeof import asizeof In [4]: y=a*x**3+b*x**2+c*x+d In [5]: y1, y2, y3 = sympy.solve(y, x, check=False) In [6]: %time asizeof(y1) CPU times: user 9.63 ms, sys: 0 ns, total: 9.63 ms Wall time: 9.56 ms Out[6]: 52608 In [7]: %time hash(y1) CPU times: user 14 µs, sys: 1 µs, total: 15 µs Wall time: 19.8 µs Out[7]: 5743556980832125790 In [8]: y=a*x**4+b*x**3+c*x**2+d*x+e In [9]: y1,y2,y3,y4=sympy.solve(y,x,check=False) In [10]: %time asizeof(y4) CPU times: user 16.7 ms, sys: 2.05 ms, total: 18.8 ms Wall time: 18.6 ms Out[10]: 85208 In [11]: %time hash(y4) CPU times: user 14 µs, sys: 1 µs, total: 15 µs Wall time: 19.8 µs Out[11]: 4388441583750016728 On Mon, Aug 24, 2015 at 10:49 PM, Denis Akhiyarov <denis.akhiya...@gmail.com > wrote: > It looks like pympler works pretty well on sympy symbols, here is my > notebook: > > https://gist.github.com/denfromufa/4d0e6a94f70fac155b66 > > > On Monday, August 24, 2015 at 10:03:30 PM UTC-5, Denis Akhiyarov wrote: >> >> Nbytes is very hard in Python, and getsizeof() does not work very well. >> People has addressed this using github.com/pympler. >> Not sure if anyone tried it on sympy objects and how costly is that >> calculation. Cachey has very simple nbytes calculation, mainly intended for >> numpy and pandas objects. >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "sympy" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/sympy/slKi02rzXVE/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > sympy+unsubscr...@googlegroups.com. > To post to this group, send email to sympy@googlegroups.com. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/6e7f1a64-e8b9-46b9-9dd8-28f18de3a416%40googlegroups.com > <https://groups.google.com/d/msgid/sympy/6e7f1a64-e8b9-46b9-9dd8-28f18de3a416%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CALoNiQfemyyeGWLfRWaCw44kZ8wLvF6ai5BeUWQ7Fi%3DZV4k9fg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
