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doc: correct comment about mmap

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* doc/grep.texi (Other Options) [--mmap]: This option is now
ignored, so using it can have no effect on performance.
This commit is contained in:
Reuben Thomas 2011-05-02 12:41:15 +01:00 committed by Jim Meyering
parent 30e9a3b769
commit 5329e00c99
1 changed files with 1 additions and 1 deletions
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doc/grep.texi
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@ -668,7 +668,7 @@ This can cause a performance penalty.
@cindex memory mapped input
This option is ignored for backwards compatibility. It used to read
input with the @code{mmap} system call, instead of the default @code{read}
system call. On modern systems, @samp{--mmap} rarely if ever yields
system call. On modern systems, @code{mmap} would rarely if ever yield
better performance.
@item -U