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Full Discussion: Why is cut slower than awk?
Top Forums UNIX for Advanced & Expert Users Why is cut slower than awk? Post 302284635 by angheloko on Friday 6th of February 2009 01:55:57 AM
Old 02-06-2009
Out of curiosity, I also tried some testing myself. On a file with 250 lines there's no difference.

But on a file with 1000 lines, cut was faster by 1 sec.

On a file with 10000 lines, the result is the same:

Code:
FILE
450000 Feb  6 14:32 test.file

CONTENTS
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
the quick brown fox jumped over the lazy dog
...
...

USING AWK
real    0m0.07s
user    0m0.05s
sys     0m0.10s

USING CUT
real    0m0.02s
user    0m0.01s
sys     0m0.02s

I'm using HP-UX. Maybe awk is better for files far larger than 10000 lines while cut is better for smaller files. Or maybe because of their differences in primary use. I'm not sure about this though. Need to do some more tests.

Last edited by angheloko; 02-06-2009 at 03:03 AM..
 

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linsert(3tcl)						       Tcl Built-In Commands						     linsert(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME
linsert - Insert elements into a list SYNOPSIS
linsert list index element ?element element ...? _________________________________________________________________ DESCRIPTION
This command produces a new list from list by inserting all of the element arguments just before the index'th element of list. Each ele- ment argument will become a separate element of the new list. If index is less than or equal to zero, then the new elements are inserted at the beginning of the list. The interpretation of the index value is the same as for the command string index, supporting simple index | arithmetic and indices relative to the end of the list. EXAMPLE
Putting some values into a list, first indexing from the start and then indexing from the end, and then chaining them together: set oldList {the fox jumps over the dog} set midList [linsert $oldList 1 quick] set newList [linsert $midList end-1 lazy] # The old lists still exist though... set newerList [linsert [linsert $oldList end-1 quick] 1 lazy] SEE ALSO
list(3tcl), lappend(3tcl), lindex(3tcl), llength(3tcl), lsearch(3tcl), lset(3tcl), lsort(3tcl), lrange(3tcl), lreplace(3tcl), string(3tcl) | KEYWORDS
element, insert, list Tcl 8.2 linsert(3tcl)
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