Peter Otten wrote:
>
> # Norvitz/Lundh
> def writelines_data(out, data, map=map, str=str):
> SPACE_JOIN = ' '.join
> out.writelines(
> "ELEMENT %06d %s\n" % (i1, SPACE_JOIN(map(str, i2)))
>for i0, i1, i2 in data if i0 == 'ELEMENT'
> )
>
> def print_data
Chris wrote:
> So my question is how can I speed up what's happening inside the
> function write_data()? Only allowed to use vanilla python (no psycho or
> other libraries outside of a vanilla python install).
> def write_data1(out, data):
> for i in data:
> if i[0] is 'ELEMENT':
>
[EMAIL PROTECTED] wrote:
> Generally, don't create objects, don't perform repeated operations. In
> this case, batch up I/O.
>
>> def write_data1(out, data):
>> for i in data:
>> if i[0] is 'ELEMENT':
>> out.write("%s %06d " % (i[0], i[1]))
>> for j in i[2
Chris wrote:
> This is just some dummy code to mimic what's being done in the real
> code. The actual code is python which is used as a scripting language in
> a third party app. The data structure returned by the app is more or
> less like the "data" list in the code below. The test for "ELEMENT"
Gabriel Genellina wrote:
> At Saturday 18/11/2006 05:09, John Machin wrote:
>
> > > If you can assume that all items have 6 numbers, it appears best to
> > > unroll the inner iteration.
> >
> >Is this meant to be some kind of joke?
> >If so, you should have festooned it with smilies.
> >If not, pl
Just to show how much a system set up
impacts these results:
Result from suse10.1 64 , python 2.4
with AMD FX-55 cpu and about 12 active apps
running in the background. 7200rpm sata drives.
Preparing data...
[write_data1] Preparing output file...
[write_data1] Writing...
[write_data1] Done in 5.4
At Saturday 18/11/2006 05:09, John Machin wrote:
> If you can assume that all items have 6 numbers, it appears best to
> unroll the inner iteration.
Is this meant to be some kind of joke?
If so, you should have festooned it with smilies.
If not, please proceed straight to http://www.thedailyWTF
On Nov 18, 4:23 pm, Gabriel Genellina <[EMAIL PROTECTED]> wrote:
> If you can assume that all items have 6 numbers, it appears best to
> unroll the inner iteration.
Is this meant to be some kind of joke?
If so, you should have festooned it with smilies.
If not, please proceed straight to http:/
On Nov 18, 2:05 pm, Chris <[EMAIL PROTECTED]> wrote:
> with this function I went from 8.04 s to 6.61 s.
And your code became less understandable.
> Now running up against
> my limited knowledge of python. Any chance of getting faster?
You have saved 1.4 *seconds*. What is the normal running ti
Chris wrote:
> I have a vested interest in showing a colleague that a python app can
> yield results in a time comparable to his C-app, which he feels is mch
> faster. I'd like to know what I can do within the constraints of the
> python language to get the best speed possible. Hope someone can he
Chris wrote:
> This is just some dummy code to mimic what's being done in the real
> code. The actual code is python which is used as a scripting language in
> a third party app. The data structure returned by the app is more or
> less like the "data" list in the code below. The test for "ELEMEN
At Friday 17/11/2006 23:40, Chris wrote:
This is just some dummy code to mimic what's being done in the real
code. The actual code is python which is used as a scripting language in
a third party app. The data structure returned by the app is more or
less like the "data" list in the code below.
Hi, Chris.
I made a trivial testing framework for this cute problem and tried a
couple of modifications. I also added the 10% of non-ELEMENT lines you
mentioned. First thing, your updated algorithm didn't really get me much
faster results than the original. I guess that my disk array sort
Chris wrote:
> This is just some dummy code to mimic what's being done in the real
> code. The actual code is python which is used as a scripting language in
> a third party app. The data structure returned by the app is more or
> less like the "data" list in the code below. The test for "ELEMEN
"Chris" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> def write_data1(out, data):
> for i in data:
> if i[0] is 'ELEMENT':
Testing for equality with 'is' is a bit of a cheat since it is
implementation dependent,
but since you have a somewhat unfair constraint
>
This is just some dummy code to mimic what's being done in the real
code. The actual code is python which is used as a scripting language in
a third party app. The data structure returned by the app is more or
less like the "data" list in the code below. The test for "ELEMENT" is
necessary ...
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