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Programming > Apl > Re: Kdb equival...
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Re: Kdb equivalent for J

by microapl@[EMAIL PROTECTED] Apr 21, 2008 at 01:23 AM

On 21 Apr, 03:59, "amit.bolakani.techni...@[EMAIL PROTECTED]
"
<amit.bolak...@[EMAIL PROTECTED]
> wrote:

>
> I still had one more question on this topic: Do you guys think or know
> from your experience that large excel type files (say around 50,000
> rows) can be easily managed as memory mapped files without taking a
> performance hit?

50,000 rows does not sound particularly large.  Unless you've got many
thousands of columns, it should fit easily into the workspace of any
32-bit (let alone 64-bit) APL, and performance should not be a problem
for column-based operations with this amount of data.  You can try
this out using the APLX demo version (free download from
http://www.microapl.com/apl)
- take a look at Quad-IMPORT and Quad-EXPORT for reading and writing
the file.

Although it's not open source, APLX provides free runtimes for
Windows, Mac and Linux.

Richard Nabavi
MicroAPL Ltd




 8 Posts in Topic:
Kdb equivalent for J
"amit.bolakani.techn  2008-04-19 15:08:06 
Re: Kdb equivalent for J
aleph0 <apl68000@[EMAI  2008-04-19 15:41:35 
Re: Kdb equivalent for J
neitzel@[EMAIL PROTECTED]  2008-04-20 16:35:58 
Re: Kdb equivalent for J
sethb@[EMAIL PROTECTED]   2008-04-27 18:04:54 
Re: Kdb equivalent for J
"amit.bolakani.techn  2008-04-19 16:54:35 
Re: Kdb equivalent for J
cdburke@[EMAIL PROTECTED]  2008-04-19 20:32:13 
Re: Kdb equivalent for J
"amit.bolakani.techn  2008-04-20 19:59:28 
Re: Kdb equivalent for J
microapl@[EMAIL PROTECTED  2008-04-21 01:23:36 

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