CODEWITHSUNDEEP
pythonvirtualenv
f10w
f10w

Reputation: 1586

Python: significant difference in performance between local installation and virtual environment

I observed a significant difference in performance between my local Python (2.7) and a virtual environment (on the same machine).

I tested the following script:

import numpy as np
import time

A = np.random.rand(500, 3000)
B = np.random.rand(5000, 3000)

tic = time.time()
p = np.dot(A, B.T)
toc = time.time()
print toc - tic

It was ~20 times faster in the local environment.

What could be the reasons? (Maybe there is a package that accelerates vectorized operations installed in the my local Python but not on the virtual environment?)

Thank you in advance for any suggestions.

Upvotes: 0

Views: 779

Answers (1)

f10w
f10w

Reputation: 1586

As suggested by @BiRico, I checked the version of Linear Algebra libraries such as BLAS and LAPACK using the command:

python -c 'import numpy; numpy.show_config()'

and surprised, I do not have any of these installed.

Upvotes: 1

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