Adding to the front of a line

[Florian Diesch]

Matthew Flaschen <matthew.flaschen at gatech.edu> wrote:

> Cameron Hutchison wrote:
>> If the file is not very big, looping in bash will work ok, but once you
>> start dealing with larger files, you really want to use other tools than
>> bash loops. 
>
> I doubt you'll get any noticeable performance difference.  The bash
> script I gave does not fork any external processes.

But shell code is interpreted while sed is native code.

Using "seq 1 1000000 " as input the shell codes needs about 18s here
while sed needs about 7s.



   Florian
-- 
<http://www.florian-diesch.de/>
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