On Tue, 21 Feb 2012 19:51:07 -0800, CM wrote: > I have an application that I was hoping to reduce a bit the size of its > .exe when "packaged" with py2exe. I'm removing some Python modules such > as Tkinter, etc., but now wonder how much I could size I could reduce by > refactoring--and therefore shortening--my code.
Well that will depend on how much you refactor it, but frankly, unless your code is truly awful, this will be a micro-optimization. py2exe bundles a Python runtime environment plus your files into a single exe file. Typically the runtime environment will be somewhere around 11MB for wxPython GUI apps (or 4MB with compression turned on, which will slow your application down). http://www.py2exe.org/index.cgi/SingleFileExecutable The runtime environment for Oracle's Java environment starts at 7MB and is typically 15MB, plus whatever libraries your own code produces. For dot-net applications, the framework can be up to 60MB. http://weblogs.java.net/blog/stanleyh/archive/2005/05/deployment_unde.html http://www.hanselman.com/blog/SmallestDotNetOnTheSizeOfTheNETFramework.aspx While I think 60MB for a basic calculator app is taking the piss, this is 2011 not 1987 and we don't have to support floppy disks any more. 11MB for a GUI app is nothing to be worried about. That takes, what, 3 minutes to download even on a 512 kbps link? > Is there a rule of thumb that predicts the relationship between the > number of lines of Python code and the resultant size of the application > (leaving aside the size of imported modules)? Yes. To a close approximation, for most applications: size of bundled application = ( size of Python runtime environment + size of libraries used ) Your code is most likely insignificant compared to the others. > Or is there a way to > roughly estimate how much would refactoring the code as much as I > reasonably can help? (For example, in some cases there is some cut and > paste coding...I know, it's bad). Look at it this way: take the .pyc file from your code. How big is it? Say, it's 200K. That's a BIG file -- the decimal module in the standard library is only 152K. Suppose you could cut it in half -- you would save 100K. Even if you could somehow cut it down to 1K, you've saved less than 200K. Do you care? Refactoring your code is double-plus good for maintainability. You should do it anyway. But don't do it to shrink an 11MB exe down to 10.8MB. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
