btrfs ext4 xfs性能比较

创建了三个分区,总容量都是50G。发现XFS占用的元数据最多,其次是ext4;btrfs元数据最少。

BTRFS EXT4 XFS
git add . real 21m23.858s
user 17m8.905s
sys 1m43.146s
real 30m5.863s
user 21m13.333s
sys 2m41.837s
real 26m8.169s
user 19m3.882s
sys 2m36.098s
git commit real 5m41.189s
user 4m9.084s
sys 0m43.782s
real 13m47.376s
user 6m51.124s
sys 2m37.119s
real 9m54.621s
user 5m36.699s
sys 1m59.425s
git gc real 41m45.560s
user 62m45.492s
sys 5m52.132s
real 46m1.580s
user 63m24.969s
sys 4m31.180s
real 52m18.160s
user 67m40.972s
sys 4m55.289s

结论:在这三种文件系统中,BTRFS对Git(大量小文件)的支持最好。

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