git-log: --topo-order speed-ups the thing !?
From: Marco Costalba <hidden>
Date: 2016-06-15 22:43:22
Testing with git log performance on Linux tree I found this interesting and unexpected result: $ time git log --parents --boundary --pretty=raw -z --log-size --topo-order HEAD > /dev/null 6.85user 0.20system 0:07.05elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+21142minor)pagefaults 0swaps $ time git log --parents --boundary --pretty=raw -z --log-size HEAD > /dev/null 7.01user 0.09system 0:07.10elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+11128minor)pagefaults 0swaps Although page faults are more or less the half, execution time is faster _with_ --topo-order option. Someone could explain why? Thanks Marco