Re: [Pytables-users] Indexed & .createIndex() runtime

[Francesc A. <fa...@ca...>]

A Dijous 13 Gener 2005 21:42, kevin lester va escriure:
> Success :-)

Glad to hear that

> If PATH =3D=3D PYTHONPATH, then yes, I do have
> zlib.dll(along with the others) in the /WINDOWS/SYSTEM
> folder with the PATH pointing to it.

No, PYTHONPATH should not point to the zlib.dll directory. Just make sure
that the zlib.dll is in a directory listed in your PATH environment
variable. That should be enough.

> >>> Running 'C:\H5\klester.py' ...
> C:\Python24\lib\site-packages\tables\Leaf.py:90:
> UserWarning: zlib compression library is not
> available. Using zlib instead!.
>   warnings.warn( \
> Time for standard query--> 0.0620000362396
> Time for inkernel query--> 0.0469999313354
> Time for indexed query--> 0.0160000324249

Ooops, you are getting a factor 3 for speed-up compared with inkernel and a
factor of 4 against standard. That's quite a lot. In my laptop (Pentium 4 @
2 GHz, python 2.3.4), I'm getting the next figures:

$ python klester.py
Time for standard query--> 0.147189855576
Time for inkernel query--> 0.0714249610901
Time for indexed query--> 0.0375471115112

where the speed-up is clearly inferior. Just out of curiosity, which
processor, speed, and python version are you using?

Cheers,

=2D-=20
>OO< =A0 Francesc Altet    ||  http://www.carabos.com/
V =A0V =A0 Carabos Coop. V.  ||  Who is your data daddy? PyTables
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