dfaoptimize() is not set fast flag even if it is success, but it is wrong. If success, dfa matcher uses algorithm for single byte, and it is so fast.
I think this bug does not affect for grep, but it will affect with the patch that I just sent to gawk.
0001-dfa-minor-fix-for-whether-dfa-is-fast-or-not.patch
Description: Binary data
