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Full Discussion: Awk Vs Fgrep
Top Forums Shell Programming and Scripting Awk Vs Fgrep Post 302382434 by morbid_angel on Wednesday 23rd of December 2009 08:07:03 AM
Old 12-23-2009
Bug Awk Vs Fgrep

Hi All,
I have 2 files new.txt and old.txt

Code:
 
cat new.txt
    sku1|v1|v2|v3
    sku2|v11|v22|v33
    sku3|v11|v22|v33
 
cat old.txt
    sku1|vx1|vx2|vx3
    sku2|vx11|vx22|vx33
    sku3|v11|v22|v33

The key column in both files are first column itself.
I want to get records in new.txt which are not there in old.txt

expected output
Code:
sku1|v1|v2|v3
sku2|v11|v22|v33

The fgrep command fgrep -v -f old.txt new.txt gives me the right answer.
But in my file ,noSmilief columns are 20 and length of each colums is very huge. So fgrep is very slow.. Can we replace fgrep with awk So that this will complete faster .Thnxx in advance

Last edited by zaxxon; 12-23-2009 at 09:17 AM.. Reason: use code tags please, thank you
 

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grcompiler(1)															     grcompiler(1)

NAME
grcompiler - Compile GDL into a TrueType Font SYNOPSIS
grcompiler [-d] [-D] [-g] [-n number] [-v number] [-w number] [-wall] [-q] gdl-file font-file [output-file] [output-fontname] Description Grcompiler compiles a Graphite Description Language description of the smarts for a font along with a TrueType Font to create a graphite font with graphite tables in it. -d Generate XML debugger file. -D Generate all debugger files. -g Permit and ignore invalid glyph definitions. -nnumber Set name table start location. -q Quiet mode (no messages except on error). -vnumber Set Silf table version number. -wnnnn Ignore warning with the given number. This option may be repeated. -wall Display all warnings. Environment grcompiler makes use of the following environment variables GDLPP Specifies the command to execute to run the GDL preprocessor Files gdlerr.txt Warnings and errors are output to this file. dbg_classes.txt Debug file that specifies the classes stored in the font in terms of their GDL source and containing glyph ids in hex. dbg_cmap.txt Debug file giving Unicode to glyph mapping of all the glyphs in the font and vice versa. dbg_enginecode.txt Debug file containing the action code and constraint code associated with each pass and rule in a pass. dbg_fsm.txt Debug file that gives the finite state machines of each pass and the rules referenced. For each pass, a mapping is given between glyph and column number. dbg_glyphattrs.txt Debug file containing all the glyph attributes and their names, along with values specified for each glyph. dbg_parsetree.txt Debug file giving the complete parse tree of the GDL source file. dbg_ruleprec.txt Debug file that lists the rules in precedence order (order in which they will be tested) for each pass. $_temp.gdl Debug file containing the output of gdlpp Author Martin Hosken <mhosken@users.sourceforge.net> $Date: 2012-05-29 11:36:50 $ grcompiler(1)
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