Grant Edwards schrieb:
> On 2007-06-14, Leo Kislov <[EMAIL PROTECTED]> wrote:
>> On Jun 13, 5:40 pm, [EMAIL PROTECTED] wrote:
>>> Hi all,
>>>
>>> I am running Python 2.5 on Feisty Ubuntu. I came across some code that
>>> is substantially slower when in a method than in a function.
>>>
>>>>>> cProfile.run("bar.readgenome(open('cb_foo'))")
>>> 20004 function calls in 10.214 CPU seconds
>>>>>> cProfile.run("z=r.readgenome(open('cb_foo'))")
>>> 20004 function calls in 0.041 CPU seconds
>>>
>> I suspect open files are cached
>
> They shouldn't be.
>
>> so the second reader picks up where the first one left: at the
>> of the file.
>
> That sounds like a bug. Opening a file a second time should
> produce a "new" file object with the file-pointer at the
> beginning of the file.
It's a OS thing.
Diez
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