Hello again Python programmers,
Final update on my Python 2.7.3 build issues. After much insanity I
finally used a process sniffer when running Python and tracked down that
because of a path environment variable and the stupidity of Microsoft, Windows
was loading another python27.dll rather than the one in the directory with the
python.exe that I built, thus rendering my former tests useless. Sorting this
out using the .exe.local trick, I was able to re-test everything and come to
reliable conclusions. Based on performance results, it is without a doubt in
my mind that the Python 2.7.3 precompiled binaries in the MSI are a PGO build.
I can now build my own binaries with the same performance as the released
precompiled binaries. And on my machine at least, these PGO built binaries do
perform 30-36% faster than a normal release build. Useful information if
you're doing your own Python builds. I'd still like to see Python start
including some thorough build documentation on each release, but I'm certainly
not
going to be holding my breath on that. ;) Cheers.
Sincerely,
Arah Leonard
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