Darryl,
Sunday, March 2, 2003 you wrote:
DK> Good answer,
Well, I hope it helped.
Just to demonstrate how seemingly minor details can make such
large performance differences consider the following 2 programs
that do exactly the same thing.
I'm working on my own February logs:
28 files;
147,010,916 bytes;
1,560,832 lines
Each program lists all of the log files in the imail spool
directory for month 02. Each then counts the lines in each file
as well as the bytes and sums the total. Each program opens the
file, reads in all lines, and closes.
I have a Perl script that takes almost 7 minutes to do this.
That's approximately 222,976 lines per minute or 3,716 lines per
second. I'm quite certain I can improve this since my first file
is processed very quickly and then successive files are much
slower.
I have another program however that does exactly the same thing in
2.65 seconds. That's 588,993 lines per second.
Both programs are single threaded and not optimized.
Kind of makes me want to invest more time on the 2nd one.
Terry Fritts
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