grep branch, master, updated. v3.1-41-gc5c3b2e

[Jim Meyering]

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http://git.savannah.gnu.org/cgit/grep.git/commit/?id=c5c3b2ef023f996d0a80c8380945804a7575680a


commit c5c3b2ef023f996d0a80c8380945804a7575680a
Author: Jim Meyering <address@hidden>
Date:   Sat Oct 13 21:42:29 2018 -0700

    doc: NEWS: mention performance improvements
    
    * NEWS (Improvements): Mention them.

diff --git a/NEWS b/NEWS
index 084aa1c..4a8b4b8 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,14 @@ GNU grep NEWS                                    -*- outline 
-*-
 
 ** Improvements
 
+  An over-30x performance improvement when many 'or'd expressions
+  share a common prefix, thanks to improvements in gnulib's dfa.c,
+  by Norihiro Tanaka.  See gnulib commits v0.1-2110-ge648401be,
+  v0.1-2111-g4299106ce, v0.1-2117-g617a60974
+
+  An additional 3-23% speed-up when searching large files, via
+  increased initial buffer size.
+
   grep now diagnoses stack overflow.  Before grep-2.6, the included
   regexp code would detect it.  Since 2.6, grep defaulted to using
   glibc's regexp, which lost that capability.

-----------------------------------------------------------------------

Summary of changes:
 NEWS | 8 ++++++++
 1 file changed, 8 insertions(+)


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