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author | Michal Schmidt <mschmidt@redhat.com> | 2014-12-17 15:07:25 +0100 |
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committer | Michal Schmidt <mschmidt@redhat.com> | 2014-12-18 14:35:30 +0100 |
commit | 7943f42275025e1b6642b580b19b24dfab8dee61 (patch) | |
tree | de4b31ad2a1996ba062c164c8f5197e1f2975e10 /units/systemd-networkd-wait-online.service.in | |
parent | 6e693b42dcb0b332364b0414107826826925c49f (diff) |
journal: optimize iteration by returning previously found candidate entry
In next_beyond_location() when the JournalFile's location type is
LOCATION_SEEK, it means there's nothing to do, because we already have
the location of the candidate entry. Do an early return. Note that now
next_beyond_location() does not anymore guarantee on return that the
entry is mapped, but previous patches made sure the caller does not
care.
This optimization is at least as good as "journal: optimize iteration:
skip files that cannot improve current candidate entry" was.
Timing results on my workstation, using:
$ time ./journalctl -q --since=2014-06-01 --until=2014-07-01 > /dev/null
Before "Revert "journal: optimize iteration: skip files that cannot
improve current candidate entry":
real 0m5.349s
user 0m5.166s
sys 0m0.181s
Now:
real 0m3.901s
user 0m3.724s
sys 0m0.176s
Diffstat (limited to 'units/systemd-networkd-wait-online.service.in')
0 files changed, 0 insertions, 0 deletions