Vito Caputo db3f45e2d2 basic: use _unlocked() stdio in strip_tab_ansi() (#6385)
Trivial performance boost by explicitly bypassing the implicit
locking of stdio.

This significantly affects common cases of `journalctl` usage:

 Before:

  # time ./journalctl -b -1 > /dev/null
   real    0m26.628s
   user    0m26.495s
   sys     0m0.125s

  # time ./journalctl -b -1 > /dev/null
   real    0m27.069s
   user    0m26.936s
   sys     0m0.134s

  # time ./journalctl -b -1 > /dev/null
   real    0m26.727s
   user    0m26.607s
   sys     0m0.119s

 After:

  # time ./journalctl -b -1 > /dev/null
   real    0m23.394s
   user    0m23.244s
   sys     0m0.142s

  # time ./journalctl -b -1 > /dev/null
   real    0m23.283s
   user    0m23.160s
   sys     0m0.121s

  # time ./journalctl -b -1 > /dev/null
   real    0m23.274s
   user    0m23.125s
   sys     0m0.144s

Fixes https://github.com/systemd/systemd/issues/6341
2017-07-18 00:05:52 +02:00
2017-06-25 13:19:10 -04:00
2017-07-13 19:21:40 -04:00
2015-08-31 18:12:37 +02:00
2017-07-03 11:19:20 +02:00
2015-06-03 00:22:53 +02:00
2014-06-04 15:41:10 -04:00
2017-07-13 19:37:07 -04:00
2017-05-05 21:19:04 -04:00
2016-10-06 11:53:58 -04:00
2017-07-10 18:25:58 +02:00

systemd - System and Service Manager

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