2 comments

[ 3.2 ms ] story [ 17.1 ms ] thread

  ** Improvements
    sed's regular expression matching is now typically 10x faster

    sed now uses unlocked-io where available, resulting in faster I/O
    operations.
Fixes a bug introduced between 1998 and 2002 (between the last 3.x and first 4.x). Someone somewhere presumably has written a sed script working around the bug for 15 years!