05-21-2014
I think if you have a 15MB shell script it's going to be slow no matter what. So if speeding things up is important the best approach is, unfortunately, to redesign the script and break functions into separate pieces. If you do that in a way that makes sense, by creating separate scripts that perform logical sub-tasks, then only the parts that need to run at any given time will be executed. It will probably be easier for you and whoever else inherits it to maintain going forward as well.
If you really have ONE shell function that's around 15MB, that's likely to be a painful redesign though.
And if the entire thing has to run each time, then breaking it up won't help much either. In that case, I think converting to another language that's compiled (C) or at least pre-parsed (python) would be your best bet.
This User Gave Thanks to cnamejj For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Simple shell script :
date
test_fn()
{
echo "function within test shell script "
}
on the shell prompt I run
> . test
Then I invoke the function on the command line as below :
test_fn()
It echos the line
function within test shell script
and works as expected.
... (5 Replies)
Discussion started by: r_subrahmanian
5 Replies
2. Shell Programming and Scripting
i've been told that c shell does not support functions/subroutines is that true?
if not can somebody give me the basic syntax for creating a function. it would very much appreciated!
thanks in advance (1 Reply)
Discussion started by: ballazrus
1 Replies
3. Shell Programming and Scripting
Hi All,
I have a very long code called myfunction -> "if ..... else if .... else if ..end if "
And i have several other codes which need to call the "myfunction" code.
How can C-shell call a function "B]myfunction" ? Can any body give me an example ?? (1 Reply)
Discussion started by: Raynon
1 Replies
4. Shell Programming and Scripting
Hi,
I have a query ..
i have 2 scripts say 1.sh and 2.sh
1.sh contains many functions written using shell scripts.
2.sh is a script which needs to call the functions definded in 1.sh
function calls are with arguments.
Can some one tell me how to call the functions from 2.sh?
Thanks in... (6 Replies)
Discussion started by: jisha
6 Replies
5. Shell Programming and Scripting
hi friends,
I am working with shell commands and all these works properly.
Then i created a small function which includes these commands.
Now the problem arises. When the commands are run by calling this fuction.it
shows error.
Why i am not able to run the unix command inside a function.... (1 Reply)
Discussion started by: gjithin
1 Replies
6. Shell Programming and Scripting
hey guys,
i made up a library file called common.lib so as to reuse the same code without typing it again. here is the code. its pretty basic .
## This is the second function
compare()
{
file1 = $1
file2 = $2
cmp $file1 $file2
if
then
echo "comparison is possible"... (1 Reply)
Discussion started by: Irishboy24
1 Replies
7. Shell Programming and Scripting
Hi all,
I have a doubt..
If we create shell functions through a script itself, can we use the same functions in command line also..
for example:
$ cat a.sh
##### Functions
function system_info
{
}
function show_uptime
{
} (4 Replies)
Discussion started by: raghu.iv85
4 Replies
8. Shell Programming and Scripting
so i noticed that when a shell script has a function defined in it, running "sh -x" on that shell script from the command line doesnt show what the function is doing. i like this.
is there anyway for anyone to get around that? to be able to see exactly what a function or functions are doing? (4 Replies)
Discussion started by: SkySmart
4 Replies
9. Shell Programming and Scripting
Hello,
I have a requirement to apply hashing algorithm on flat file on one or more columns dynamically based on header
sample input file
ID|NAME|AGE|GENDER
10|ABC|30|M
20|DEF|20|F
say if i want multiple columns based on the header example id,name or id,age or name,gender and hash and... (13 Replies)
Discussion started by: mkathi
13 Replies
10. UNIX for Beginners Questions & Answers
I want to find c function definition with pattern with shell script by checking condition for each line:
data_type
functionname(param_list){
....
}
I knew cscope or ctag is usable for this task, but if there any ways to do without using them.
I am thinking of checking line condition... (3 Replies)
Discussion started by: cmdcmd
3 Replies
LEARN ABOUT DEBIAN
isympy
isympy(1) isympy(1)
NAME
isympy - interactive shell for SymPy
SYNOPSIS
isympy [-c | --console]
isympy [ {-h | --help} | {-v | --version} ]
DESCRIPTION
isympy is a Python shell for SymPy. It is just a normal python shell (ipython shell if you have the ipython package installed) that exe-
cutes the following commands so that you don't have to:
>>> from __future__ import division
>>> from sympy import *
>>> x, y, z = symbols("xyz")
>>> k, m, n = symbols("kmn", integer=True)
So starting isympy is equivalent to starting python (or ipython) and executing the above commands by hand. It is intended for easy and
quick experimentation with SymPy. For more complicated programs, it is recommended to write a script and import things explicitly (using
the "from sympy import sin, log, Symbol, ..." idiom).
OPTIONS
-c shell, --console=shell
Use the specified shell (python or ipython) as console backend instead of the default one (ipython if present or python otherwise).
Example: isympy -c python
FILES
${HOME}/.sympy-history
Saves the history of commands when using the python shell as backend.
BUGS
The upstreams BTS can be found at <http://code.google.com/p/sympy/issues/list> Please report all bugs that you find in there, this will
help improve the overall quality of SymPy.
SEE ALSO
ipython(1), python(1)
2007-10-8 isympy(1)