[Distutils] buildout: several fold performance increases

[Ross Patterson]

Marius Gedminas <marius at pov.lt> writes:

> On Sat, Jan 21, 2012 at 02:48:55PM -0800, Ross Patterson wrote:
>> > Marius Gedminas <marius at pov.lt> writes:
>> >> How can I test your branch?
>> 
>> Here's how I just managed to test my real-world buildouts using my
>> zc.buildout and buildout.dumppickedversions checkouts and compare those
>> times against the released versions (1.4 and 0.4 respectively).
> [...]
>> Now time with the zc.buildout checkout by overriding the version pin for
>> zc.buildout:
>> 
>>     $ bin/buildout -N versions:zc.buildout= && time bin/buildout -N versions:zc.buildout=
>
> My baseline is 41s (that includes 'newest = false' in my buildout.cfg,
> which is what -N does here).
>
> Your modified buildout's first run was 12s.  Second run decided to
> recompile PIL for no reason and took 37s.  Third, fourth and fifth runs
> were 10s each.
>
> Awesome.  I want your branch merged.

Was your baseline under zc.buildout 1.5?

Ross