[Python-Dev] Re: [Python-checkins] python/dist/src/Lib warnings.py, 1.19, 1.20

[Skip Montanaro]

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    Guido> OK.  Please report old and new startup times!

That seems to be a little harder than you'd think.  First, I had to fix
encodings/__init__.py as well.  Here are some numbers.  In all cases the
interpreter is as I built it from CVS on May 6.  PYTHONSTARTUP is not
defined.

    "import re" at top level:

    Without -S (best real time of 5 runs):

        % time python -c pass
        
        real    0m0.169s
        user    0m0.100s
        sys     0m0.030s

    With -S (best of 5):

        % time python -S -c pass
        
        real    0m0.125s
        user    0m0.020s
        sys     0m0.080s

    Proposed mods to warnings.py (and provisional replacement of re with
    string translation tables in encodings/__init__.py):

    Without -S (best of 5):

        % time python -c pass

        real    0m0.187s
        user    0m0.120s
        sys     0m0.030s

    With -S (best of 5):

        % time python -S -c pass

        real    0m0.118s
        user    0m0.020s
        sys     0m0.020s

Not too exciting.  I verified using -v that these modules are imported in
2.3 with no PYTHONSTARTUP and the -S flag after my changes:

    UserDict
    copy_reg
    linecache
    os
    posix
    posixpath
    stat
    types
    warnings
    zipimport

Without -S (and my sitecustomize.py file moved) I get these:

    UserDict
    copy_reg
    linecache
    os
    posix
    posixpath
    site
    stat
    types
    warnings
    zipimport

I've got to get back to some paying work, so I can't pursue this more at the
moment.  Attached are my current diffs for warnings.py and encodings/
__init__.py if someone has a few moments to look at it.

Skip


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