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Full Discussion: Reporting characters after string
Top Forums UNIX for Dummies Questions & Answers Reporting characters after string Post 302970701 by Scrutinizer on Sunday 10th of April 2016 11:29:26 PM
Old 04-11-2016
About the awk approach:
What OS are you using and what awk ?
How many lines are there and how long are they?
Could you try the same using mawk, which usually is the fastest awk available (perhaps you can install a package onto your system?)...

Also, could you try replacing:
Code:
rec=substr(rec, RSTART+1)

with
Code:
rec=substr(rec, RSTART+RLENGTH+len+1)

What it did was re-examing the string that was found to see if there is another match with a part of the same sequence, perhaps that is not necessary..
 

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LEARN ABOUT PLAN9

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other 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 the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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