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Full Discussion: Timing the shell script
Top Forums Shell Programming and Scripting Timing the shell script Post 302809433 by luhah on Sunday 19th of May 2013 11:13:22 PM
Old 05-20-2013
Timing the shell script
I have two shell scripts, one written with xargs for parallel processing (p1) and the other written in old school way (p3) [ `jobs | wc -l` -ge 25 ].

when I execute them, i get the below values.

Code:
$ time ./p1
real    0m25.36s
user    0m0.32s
sys     0m0.80s

$ time ./p3
real    0m23.25s
user    0m6.20s
sys     0m22.36s

Leaving the realtime (elasped time), what does the other time numbers mean in terms of efficiency

Thanks much
Last edited by jim mcnamara; 05-20-2013 at 12:23 AM..
 

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LEARN ABOUT CENTOS

platform::shell

platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4							platform::shell(n)
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