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Top Forums Shell Programming and Scripting Better way to run this perl command Post 302648895 by SkySmart on Wednesday 30th of May 2012 01:43:30 PM
Old 05-30-2012
Quote:
Originally Posted by joeyg
Seems all you need is plain-vanilla grep, not any fancy options.
Grep on what you think will have the fewest matches, to make a much smaller file. Then grep on the other option.

Or, are you trying to determine if perl & if is faster than grep?
yes i'm trying to see if perl is faster than grep.

and posting the input file is not an option at all. and the strings i picked out to search for necessary. i deliberately picked them.
 

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BZGREP(1)						      General Commands Manual							 BZGREP(1)

NAME
bzgrep, bzfgrep, bzegrep - search possibly bzip2 compressed files for a regular expression SYNOPSIS
bzgrep [ grep_options ] [ -e ] pattern filename... bzegrep [ egrep_options ] [ -e ] pattern filename... bzfgrep [ fgrep_options ] [ -e ] pattern filename... DESCRIPTION
Bzgrep is used to invoke the grep on bzip2-compressed files. All options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If bzgrep is invoked as bzegrep or bzfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, bzgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep bzgrep string files for csh: (setenv GREP fgrep; bzgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca). Adapted to bzip2 by Philippe Troin <phil@fifi.org> for Debian GNU/Linux. SEE ALSO
grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1) BZGREP(1)
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