[Pdl-general] [new comer's question] PDL slower than Python Numpy

[钟巍 <zho...@16...>]

Hi all, 
I am new to PDL. I want to know where is PDL performance.


I test on same virtial machine with lastest version of perl and python in  Ubuntu 20.04 LTS


Perl version:v5.32.0
Python version:3.8.5
I have a little disappoint about the result:

Perl slower a lot than python.


weizhong@weizhong-VirtualBox:~/Git/compare-pdl_numpy$ ./compare.csh

Python test1.py:
0.5u 1.0s 0:01.84 88.0% 0+0k 0+0io 0pf+0w

Perl test1.pl:
1.2u 2.0s 0:05.83 55.5% 0+0k 19064+0io 907pf+0w

Python test1.py:
0.7u 0.7s 0:02.54 60.2% 0+0k 52008+0io 141pf+0w

Perl test1.pl:
1.3u 1.9s 0:05.28 61.3% 0+0k 30432+0io 1005pf+0w

Perl Code(test1.pl):


#!/home/weizhong/tools/perl-5.32.0/perl
use PDL;
$PDL::BIGPDL = 1;
$X = zeroes(1000,500,500);
$Y = ones(1000,500,500);
$Z1 = $X + $Y;
$Z2 = $X / $Y;

[download]

Python Code(test1.py):


#!/home/weizhong/tools/Python-3.8.5/python
import numpy as np
X = np.zeros((1000,500,500))
Y = np.ones((1000,500,500))
Z1 = X+Y
Z2 = X/Y

[download]

compare.csh:



#!/bin/csh -f
echo "Python test1.py:";
time ./test1.py
echo "Perl test1.pl:";
time ./test1.pl
echo "Python test1.py:";
time ./test1.py
echo "Perl test1.pl:";
time ./test1.pl