On Tue, 18 Sep 2018 22:13:38 -0700 Jim Meyering <j...@meyering.net> wrote:
> Also, when I compared grep compiled at > 123620af88f55c3e0cc9f0aed7311c72f625bc82 (latest, including your > changes) and that compiled at the prior commit, > 9c11510507ebcd31671f10d9b88532f8e6657ad2, I find that the new version > takes over 30 seconds, while the prior one took about 20 seconds. > > FTR, I used gcc version 9.0.0 20180912, compiling with -O3. Thanks for your investigation. Sorry, I forgot to send the patch. We need the patch to optimize MERGE function to speed-up for some cases. Thanks, Norihiro
0001-dfa-optimization-for-state-merge.patch
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