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authorTavian Barnes <tavianator@tavianator.com>2020-02-29 18:35:55 -0500
committerTavian Barnes <tavianator@tavianator.com>2020-02-29 18:52:04 -0500
commit1c184e718f5745cf3a53a3c389814a792e73aa51 (patch)
tree0959d07a8e4ac507aefa4867156d144ce2eff1dd /typo.h
parent7fbf673ae2db33d6e47386bf3169d4b48f0fc8b4 (diff)
downloadbfs-1c184e718f5745cf3a53a3c389814a792e73aa51.tar.xz
passwd: Cache the user/group tables
This is a significant optimization for conditions that need these tables: Benchmark #1: ./bfs ~/code/linux -nouser >/dev/null Time (mean ± σ): 232.0 ms ± 2.5 ms [User: 44.3 ms, System: 185.0 ms] Range (min … max): 228.7 ms … 238.7 ms 12 runs Benchmark #2: ./bfs-1.6 ~/code/linux -nouser >/dev/null Time (mean ± σ): 1.050 s ± 0.012 s [User: 544.2 ms, System: 500.0 ms] Range (min … max): 1.025 s … 1.063 s 10 runs Benchmark #3: find ~/code/linux -nouser >/dev/null Time (mean ± σ): 1.040 s ± 0.012 s [User: 533.6 ms, System: 500.6 ms] Range (min … max): 1.017 s … 1.054 s 10 runs Summary './bfs ~/code/linux -nouser >/dev/null' ran 4.48 ± 0.07 times faster than 'find ~/code/linux -nouser >/dev/null' 4.52 ± 0.07 times faster than './bfs-1.6 ~/code/linux -nouser >/dev/null'
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