06-12-2008
To give you sound advice it would be necessary to know what the script is, what your input data is and what your desired output is. Post it here (not *all* the data, just a significant sample) and we will think about it.
Lacking any info the best we can do is tell you some generalized hints which may or may not help in your specific case. Here is one: Probably the several sed-calls could be combined to one single script if they are piped one into another. This might speed things considerably.
Another one: maybe you are doing something context-oriented. sed is poor in that and maybe some of its shortcomings are covered by shell constructs. If this is the case you might be better of writing the whole in awk, which will be slower than sed in what sed can do well, but faster than sed and some shell constructs connected in a pipeline.
(For instance: if you try to cut out some part of every line sed is probably faster than then often-seen "awk '{print $5}'", but if the part you are cutting is a number and you want all these numbers totalled at the end than awk is quite better than cutting with sed and adding in a shell loop.)
bakunin
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script(1) General Commands Manual script(1)
NAME
script - make typescript of terminal session
SYNOPSIS
[file]
DESCRIPTION
makes a typescript of everything printed on your terminal. It starts a shell named by the environment variable, or by default and silently
records a copy of output to your terminal from that shell or its descendents, using a pseudo-terminal device (see pty(7)).
All output is written to file, or appended to file if the option is given. If no file name is given, the output is saved in a file named
The recording can be sent to a line printer later with lp(1), or reviewed safely with the option of cat(1).
The recording ends when the forked shell exits (or the user ends the session by typing "exit") or the shell and all its descendents close
the pseudo-terminal device.
This program is useful when operating a CRT display and a hard-copy record of the dialog is desired. It can also be used for a simple form
of session auditing.
respects the convention for login shells as described in su(1), sh(1), and ksh(1). Thus, if it is invoked with a command name beginning
with a hyphen (that is, passes a basename to the shell that is also preceded by a hyphen.
The input flow control can be enabled by setting environmental variable before running Please see section for details on using this envi-
ronment variable.
EXAMPLES
Save everything printed on the user's screen into file
Append a copy of everything printed to the user's screen to file
WARNINGS
A command such as which displays the contents of the destination file, should not be issued while executing because it would cause to log
the output of the command to itself until all available disk space is filled. Other commands, such as more(1), can cause the same problem
but to a lesser degree.
records all received output in the file, including typing errors, backspaces, and cursor motions. Note that it does not record typed char-
acters; only echoed characters. Thus passwords are not recorded in the file. Responses other than simple echoes (such as output from
screen-oriented editors and command editing) are recorded as they appeared in the original session.
When there is no input flow control is not set), there can be some data loss while using However, script(1) can behave unexpectedly, if is
set and is not set.
AUTHOR
was developed by the University of California, Berkeley and HP.
script(1)