title: PyInstaller with Pandas creates over 500 MB exe
body: <p>I try to create an exe file using PyInstaller 3.2.1, for test purpose I tried to make an exe for following code:</p>
  
  <pre><code>import pandas as pd
  print('hello world')
  </code></pre>
  
  <p>After considerable amount of time (15mins +) I finished with dist folder as big as 620 MB and build - 150 MB. I work on Windows using Python 3.5.2 |Anaconda custom (64-bit). Might be worth noting that in dist folder mkl files are responsible for almost 300 MB. 
  I run pyinstaller using 'pyinstaller.exe foo.py'. I tried using --exclude-module to exclude some dependencies, still ended up with huge files. Whether I use onefile or onedir doesn't make any difference.</p>
  
  <p>I am aware that exe must contain some important files but is it normal to be as big as almost 1 GB? I can provide warning log if necessary or anything that could be helpful to solve the matter.</p>
  
  <p>P.S. In parallel my coworker created an exe from same sample script and ended up with less than 100 MB, difference is he is not using anaconda. Could that be the matter? </p>
  
  <p>Any help will be appreciated.</p>