Creating a List of Empty Lists

[Fredrik Lundh]

Robin Becker wrote:

> C:\tmp>\python22\python ttt.py
> list ()              = 3.22
> list []              = 1.33
> lambda z: list(z)    = 2.55

> C:\tmp>\python23\python ttt.py
> list ()              = 1.73
> list []              = 3.22
> lambda z: list(z)    = 4.77

is this part of the benchmark stable, or was your computer doing
something else in the background?  I find it a bit disturbing that a
2.3 optimization would slow down a trivial operation that much...

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