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Re: slow file-handling [message #6916 is a reply to message #6913]

Tue, 03 September 1996 00:00

jlaw
Messages: 11
Registered: November 1995

Junior Member

In article 1AA7@star.sr.bham.ac.uk, James Tappin <sjt@star.sr.bham.ac.uk> writes:
> Jorn Helbert wrote:
>> b_temp = double([0.,0.,0.])
>> t_temp = [0.0]
>> WHILE NOT eof(u1) DO BEGIN
>> readf,u1,t_temp,foo,foo,foo,b_temp
>> t_u = [t_u,t_temp]
>> b_u = [b_u,b_temp]
>> END
>> Any ideas how to speed this up?

> One possibility on a unix box is to spawn "wc" to see how many lines there are
> (if you need VMS portability, then select that or FSTAT according to the
> operating system [!version.os] -- I don't know about PC's & macs)

I use:-
OPENR,UNIT,filename
TEMP=''
COUNT=0
WHILE NOT EOF(UNIT)
READF,UNIT,TEMP
COUNT=COUNT+1
ENDWHILE
CLOSE,UNIT

The time is probably spent in re-allocating your t_u,b_u arrays,
not in the reading.

Suck it and see...

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[Message index]

		Re: slow file-handling By: Marty Ryba on Tue, 03 September 1996 00:00
		Re: slow file-handling By: Marty Ryba on Tue, 03 September 1996 00:00
		Re: slow file-handling By: jlaw on Tue, 03 September 1996 00:00
		Re: slow file-handling By: Hermann Mannstein on Tue, 03 September 1996 00:00
		Re: slow file-handling By: James Tappin on Tue, 03 September 1996 00:00
		Re: slow file-handling By: David Theil on Mon, 02 September 1996 00:00
		Re: slow file-handling By: brian.jackel on Wed, 04 September 1996 00:00

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