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Full Discussion: Best search technique
Top Forums Shell Programming and Scripting Best search technique Post 302408344 by radoulov on Monday 29th of March 2010 08:57:25 AM
Old 03-29-2010
It's hard to tell without seeing the code you run ...
Please try the following command and let us know the timings:
Code:
awk 'END {
  for (__ in _)
    if (_[__] < 2) 
      print __
  }
{ _[$0]++ }' infile

Use gawk, nawk or /usr/xpg4/bin/awk on Solaris.

What is the size (in MB) of your data file?
 

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wait(1) 						      General Commands Manual							   wait(1)

NAME
wait - await process completion SYNOPSIS
[pid] DESCRIPTION
If no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina- tions. If a numeric argument pid is given and is the process ID of a background process, waits until that process has completed. Other- wise, if pid is not a background process, exits without waiting for any processes to complete. Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)). Command-Line Arguments supports the following command line arguments: The unsigned decimal integer process ID of a command, whose termination is to wait for. WARNINGS
Some processes in a 2-or-more-stage pipeline may not be children of the shell, and thus cannot be waited for. SEE ALSO
csh(1), ksh(1), sh-posix(1), sh(1), wait(2). STANDARDS CONFORMANCE
wait(1)
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