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Full Discussion: sed or awk editing help
Top Forums Shell Programming and Scripting sed or awk editing help Post 302468324 by Scrutinizer on Tuesday 2nd of November 2010 11:14:25 AM
Old 11-02-2010
Which is consistent with my findings. There is not much difference between using several replace statement and using a loop, but there is a significant gain when groups are not being used.

You state this is obvious ("of course") why then didn't you use it in the first place, especially since your main concern is speed?

I do not think it was obvious at all and I cannot think of a good reason why grouping would have to take up so much time. I am glad I found out that it does though.
 

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RATFOR(1)						      General Commands Manual							 RATFOR(1)

NAME
ratfor - rational Fortran dialect SYNOPSIS
ratfor [ option ... ] [ filename ... ] DESCRIPTION
Ratfor converts a rational dialect of Fortran into ordinary irrational Fortran. Ratfor provides control flow constructs essentially iden- tical to those in C: statement grouping: { statement; statement; statement } decision-making: if (condition) statement [ else statement ] switch (integer value) { case integer: statement ... [ default: ] statement } loops: while (condition) statement for (expression; condition; expression) statement do limits statement repeat statement [ until (condition) ] break [n] next [n] and some syntactic sugar to make programs easier to read and write: free form input: multiple statements/line; automatic continuation comments: # this is a comment translation of relationals: >, >=, etc., become .GT., .GE., etc. return (expression) returns expression to caller from function define: define name replacement include: include filename The option -h causes quoted strings to be turned into 27H constructs. -C copies comments to the output, and attempts to format it neatly. Normally, continuation lines are marked with a & in column 1; the option -6x makes the continuation character x and places it in column 6. Ratfor is best used with f77(1). SEE ALSO
f77(1) B. W. Kernighan and P. J. Plauger, Software Tools, Addison-Wesley, 1976. RATFOR(1)
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