Re: here-string or echo ?

Re: here-string or echo ?

[Chet Ramey]

> Which one is more efficient
> 
> 	string='something'
> 	sed 'expr' <<< $string
> 
> or
> 
> 	echo -n $string | sed 'expr'

I'd lay odds that here strings are more efficient.

--
``Teach them politics and war so their sons may study medicine and mathematics
in order to give their children a right to study painting, poetry, music, and
architecture.''
Chet Ramey, CWRU  Inet: chet@po.CWRU.Edu   NeXT Mail: chet@macbeth.INS.CWRU.Edu

Re: here-string or echo ?

[Byron Rakitzis]

Before people start laying odds on anything, why not just look at the code?
Herestrings are implemented with a pipe. echo through a pipe is obviously
implemented with a pipe. Both write their data with one call to write() (or
as many as it takes if write does not go all the way). So barring the
differences in character-munging that the echo builtin and the herestring
implementation might have, the two are equivalent.

*I'll* lay odds that it would take a mighty large string for anyone to be
able to notice, or even measure, the difference.

here-string or echo ?

[malte]

Which one is more efficient

	string='something'
	sed 'expr' <<< $string

or

	echo -n $string | sed 'expr'

?


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