20190409_FasterPythonMeetUp_TAMIYA

Transcript

1. Cython
   
   
   
   
   numpy
   @tatatatatamiya
   

   View Slide

2. >C2
   &
   "/#9BA
   3+.87=%-@(B
   ,$1Python, C$1
   !)
   65 D:*4';
   0?, Vim
   

   View Slide

3. 
   
   u A-26 ', )(/;0
   u Scikit-learn= 7
   u @3&%!#4.+"*$(4
   u For8?:5
   u → 91>
   

   View Slide

4. %-&
   u CythonC(,*.
   
   u CFortran !')
   u Numba0jit(just in time) $"#+ → 2
   u /1&
   

   View Slide

5. /,
   *
   u 1 ~ N%') ($
   def sum_from_one(k):
   sum = 0
   for i in range(1, k+1):
   sum += i
   return sum
   sum_list = []
   for i in range(0, N):
   sum_list.append(sum_from_one(i))
   (N=10000)
   -Python 2.09 s 28.3 ms
   Cython 6.36 ms 62.5 µs
   +.#(joblib) 702 ms 21 ms
   MacBook Pro 13!(2018" )
   &4
   16GB
   OSmacOS Mojave 10.14.1
   

   View Slide

6. 2"%
   3
   u -8<471#'+,
   u *' 0
   u 9:/&$-5! 47
   u Numpylinalg.lstsq ).%
   u -5@6(&$
   0'?
   (N=10000)
   =Python 1.77 s 74.1 ms
   Cython 1.74 s 24.2 ms
   ;>#(joblib) 800 ms 20.7 ms
   

   View Slide

7. C>Cython
   u
   u + )2;B8-F:0
   u NumpyD41.JHCython? IMN
   u L
   u + )1.OpenMPKO3
   u # ',G? IA67/
   … *%&C9E
   !($ "&5=@
   

   View Slide

8. (joblib)
   u
   
   (N) Python
   (joblib)
   103 83.9 ms 2.1 ms 107 ms 5.96 ms 0.78
   104 2.09 s 28.3 ms 702 ms 21 ms 3.0
   105 1min 50s 3.61 45.5 s 1.07 s 2.4
   

   View Slide

9. ,/
   u -#(Numpy0+ . '
   25
   u &4*
   
   u Cython : 0+
   ! %$
   u 68*710+9)
   3)"%$
   

   View Slide

10. 
    
    OSS
    '5,
    u Scikit-learn&$
    u 1")./*%Numpy, Scipy6#
    u ! Cython 2
    u 743+(0
    OSS-
    

    View Slide