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Re: [bug-gnulib] speed up MODULES.html.sh a bit

From: Paul Eggert
Subject: Re: [bug-gnulib] speed up MODULES.html.sh a bit
Date: Tue, 14 Nov 2006 13:24:22 -0800
User-agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux)

Bruno Haible <address@hidden> writes:

> You also combined adjacent sed invocations. Which rule are you using here?
> When is it safe to combine
>     sed -e "$expr1" | sed -e "$expr2"
> into
>     sed -e "$expr1" -e "$expr2"
> ?

That's a tricky question to answer in general, but if $expr1 and $expr
are both simple s/foo/bar/ commands (which is the case here) the
transformation is always safe.

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