Month: September 2016

  • UNIX tip of the day – grep -P is slow

    Unless you really need some advanced regular expressions only supported by PCRE, using POSIX regular expressions with grep is usually an order of magnitude faster – that’s because the default engine with grep uses finite automata, as opposed to a backtracking algorithm which PCRE uses ( the main featuress you gain from the backtracking algorithm…


Join 164 other subscribers

Archives

  • 2024 (3)
  • 2023 (8)
  • 2022 (15)
  • 2021 (19)
  • 2020 (1)
  • 2019 (1)
  • 2018 (2)
  • 2017 (1)
  • 2016 (2)
  • 2015 (5)
  • 2014 (5)
  • 2013 (2)
  • 2011 (7)
  • 2010 (10)
  • 2009 (50)
  • 2008 (28)
  • 2007 (31)
  • 2006 (8)

Category